One‑Minute Bedtime Abs Routine That Helped a Japanese Influencer Lose 7.5 kg in Two Months — What It Does, What It Doesn’t, and How to Make It Work

Table of Contents

1. Key Highlights
2. Introduction
3. The One‑Minute Routine — Movements, Technique, and Purpose
4. Why a One‑Minute Routine Can Matter — Physiology of Small, Consistent Habits
5. Putting the Numbers to Maru’s Claim: What Does Losing 7.5 kg in Eight Weeks Entail?
6. Why Diet Carries the Load — and How to Make It Work Without Starvation
7. The Role of Sleep, Stress and Timing in Weight Change
8. Who Benefits Most from This Routine — Matching Goals to Practice
9. The Daytime Stretches — Purpose and Execution
10. Turning One Minute into a Sustainable Program — Progression, Variations and Weekly Structure
11. Nutrition in Practice: Sample Day and Simple Templates
12. Safety Considerations and Common Mistakes
13. Real‑World Examples: How Small Routines Led to Bigger Changes
14. Practical Tools: Tracking, Accountability, and Adjustments
15. Frequently Asked Questions (FAQ)

Key Highlights

• Tokyo fitness influencer Honkidasumaru (Maru) credits a 1‑minute bedtime core routine—four 10‑second moves—with aiding a 7.5 kg weight loss over eight weeks when paired with a balanced diet and daytime mobility work.
• The routine is practical, low‑impact and useful for building core endurance and daily consistency, but meaningful fat loss at the scale claimed requires sustained caloric deficit, increased daily activity and progressive training.
• Practical recommendations and a step‑by‑step eight‑week plan are included to turn a brief nightly practice into measurable, sustainable body composition change while minimizing injury risk.

Introduction

A simple body‑weight sequence performed for one minute before sleep has gone viral after a Tokyo influencer, Honkidasumaru—known to followers as Maru—said the practice helped her drop 7.5 kilograms in two months. The routine uses no equipment and can be completed on a bed or mat: ankle reaches, supine cycling, leg‑raise crunches and hip lifts with leg raises, each for ten seconds. Maru pairs the nightly minute with two short daytime stretches aimed at office workers. The appeal is obvious: minimal time commitment, no gym, and the promise of steady progress.

The routine’s popularity raises several questions for readers who want real results. How much can a single minute of targeted core work contribute to overall weight loss? What physiological mechanisms support—or limit—such claims? And how should someone integrate this routine into a realistic, safe plan to lose fat and gain tone? The following analysis examines Maru’s method in detail, explains how small habits compound, and provides a practical program and nutrition guidance to transform a bedtime minute into sustainable change.

The One‑Minute Routine — Movements, Technique, and Purpose

Maru’s core sequence is short, specific and deliberately low‑impact. It favors consistent, controlled contractions over high‑rep exhaustion. Each movement serves a different portion of the abdominal wall and surrounding stabilizers.

• Ankle reaches (10 seconds)
  • How to perform: Lie on your back with knees bent and feet flat. Tighten the abdominals and alternately reach your hands toward each ankle, rotating slightly to engage the obliques.
  • Purpose: Activates the external obliques and the transverse abdominis with reduced lumbar strain. Small ranges of motion make it easier to maintain pelvic neutral position.
• Supine cycling (10 seconds)
  • How to perform: Raise the legs off the bed at about 45 degrees. Place hands lightly at the back of the head and perform a bicycle motion, bringing opposite elbow toward knee.
  • Purpose: Engages upper and lower rectus abdominis and obliques in a dynamic pattern, improving motor coordination and circulation.
• Leg‑raise crunch (10 seconds)
  • How to perform: With knees bent, gently curl the torso upward, drawing the elbows toward the knees in a controlled crunch.
  • Purpose: Emphasizes spinal flexion and midline control; useful for reinforcing mind‑muscle connection with the rectus abdominis.
• Hip lift with leg raise (10 seconds)
  • How to perform: Hands under the hips for support, extend both legs from horizontal to 90 degrees, then slowly lower.
  • Purpose: Targets lower abdominal fibers and the hip flexors; the gluteal and posterior chain receive secondary engagement through stabilization.

Technique pointers

• Breathe deliberately: exhale during the concentric phase (the tightening or lifting) and inhale on the return. Holding breath increases intra‑abdominal pressure and can impede movement quality.
• Maintain neutral pelvis: avoid overarching or flattening the lower back. Small pelvic tilts before starting help establish the neutral position.
• Move with control: quality trumps speed. Ten seconds per move is short; making those seconds precise increases recruitment and reduces injury risk.
• Avoid neck strain during crunch variations: support, do not pull, the head with the hands.

Purpose and context The set is not designed to be an all‑in one fat‑loss system. Its strength lies in accessibility and habit formation: it lowers the barrier to consistent core work and addresses sedentary stiffness with two brief daytime stretches. For office workers who sit for hours, micro‑routines that restore mobility and stimulate circulation are valuable. But for significant weight loss, core exercises are one piece inside a larger puzzle of calories, daily activity and progressive resistance training.

Why a One‑Minute Routine Can Matter — Physiology of Small, Consistent Habits

At first glance, a 60‑second routine seems trivial for body composition change. Yet physiology explains why brief, daily inputs can produce measurable outcomes when combined with dietary adjustments and increased daily movement.

Muscle recruitment and neuromuscular adaptation Short, targeted contractions strengthen neural pathways that improve muscle activation. The nervous system learns to recruit the right muscles more efficiently; this raises movement quality for other activities and can improve posture and gait. Better recruitment reduces compensation patterns that limit exercise effectiveness. Over weeks, increased recruitment translates into greater work capacity during longer sessions.

Accumulation of small energy expenditures Each minute of exercise burns a small number of calories. The minute itself might contribute only single‑digit kilocalories to total daily expenditure, but when combined with other short sessions or cumulative NEAT (non‑exercise activity thermogenesis) throughout the day—standing, walking between meetings, fidgeting—energy expenditure rises. Small additions can tip the balance when paired with modest caloric reduction.

Muscle mass, resting metabolic rate (RMR) and afterburn Core exercises contribute modestly to muscle mass in the abdominal region, but the larger metabolic effect comes from including regular resistance exercise elsewhere. Building lean mass across larger muscle groups—legs, back, chest—has a greater impact on RMR. That said, increasing total daily activity and improving muscle activation can incrementally increase calorie burn and the “afterburn” effect (EPOC) after harder workouts.

Hormonal and behavioral effects Consistent exercise—even brief—modulates appetite hormones and stress markers for some people. A short bedtime routine can become a cue for healthier choices: improved sleep hygiene, avoidance of late‑night snacking, and psychological momentum that supports daytime activity and better diet compliance.

Habit formation and compliance A one‑minute routine addresses the most common reason people fail to exercise: time. When an action is easily repeatable, adherence increases. Consistency over months creates the conditions for progressive overload later, when time or motivation grows. The behavioral win is often the most important initial advantage.

Putting the Numbers to Maru’s Claim: What Does Losing 7.5 kg in Eight Weeks Entail?

Maru reported a 7.5 kg weight loss in two months while doing the nightly minute and following a balanced diet. Translating that claim into energy terms clarifies what likely drove the change.

Basic math

• A widely used estimate equates 1 kilogram of body fat to roughly 7,700 kilocalories (kcal). Using that figure:
  • 7.5 kg × 7,700 kcal/kg ≈ 57,750 kcal total deficit needed.
• Over 8 weeks (56 days), that equals approximately:
  • 57,750 kcal ÷ 56 days ≈ 1,032 kcal deficit per day.

Where that deficit likely came from

• The minute of core work itself: negligible—probably 2–10 kcal per session depending on intensity and body size. Over 56 days this might add 112–560 kcal—insufficient to account for the overall change.
• Diet: The largest share. A daily reduction of 700–1,000 kcal through portion control, reduced processed foods, or replacing calorically dense items with lower‑calorie alternatives can create a dramatic deficit.
• Increased NEAT: More walking, stair use, standing breaks or household chores can add hundreds of calories burned daily.
• Structured exercise: Adding even two 30‑ to 45‑minute moderate sessions per week increases weekly calorie burn and preserves lean mass.
• Water and glycogen changes: Early weight loss often includes significant reductions in glycogen stores and associated water—this can create a rapid decline on the scale during the first weeks.
• Combined effect: A practical scenario for 7.5 kg in eight weeks is an approximate 600–800 kcal/day deficit from diet plus increased NEAT and some added structured activity. The bedtime minute is unlikely to be the primary driver, but it may have improved adherence to other behaviors that produced the deficit.

Realistic expectations

• A safe and commonly recommended rate of weight loss is 0.5–1.0 kg per week. The claimed rate for Maru—roughly 0.94 kg/week—sits near the high end of that range but remains within plausible bounds for someone with significant initial weight, disciplined dietary change, and increased activity.
• Rapid weight loss is possible; however, extreme deficits risk muscle loss, metabolic slowdown, nutrient insufficiency and rebound weight regain. A balanced diet that preserves protein and includes resistance training reduces those risks.

Why Diet Carries the Load — and How to Make It Work Without Starvation

Exercise supports weight loss, but energy balance is principally determined by intake. A 1,000 kcal/day deficit is achievable primarily through diet. The question then becomes: how to create that deficit sustainably?

Principles to follow

• Preserve protein: Aim for roughly 1.2–1.6 grams of protein per kilogram of body weight per day for those actively losing weight. Higher protein preserves lean mass, increases satiety and elevates thermic effect of food.
• Prioritize whole foods: Vegetables, lean proteins, legumes, whole grains and healthy fats provide volume and nutrients for fewer calories. Fiber increases satiety and supports gut health.
• Use portion control and simple swaps: Replace calorically dense items with lower‑calorie equivalents (e.g., grilled fish instead of fried, Greek yogurt instead of sugary snacks). Measure portions for the first 2–4 weeks to calibrate intake accurately.
• Create a moderate, consistent deficit: A 500–750 kcal daily deficit is often sustainable and preserves performance better than aggressive cuts.
• Hydration and mindful timing: Drinking water and eating protein‑rich meals around workouts support performance and recovery. Limit late‑night high‑calorie snacks, which commonly derail progress.

Sample calorie scenarios

• An adult with a maintenance need of 2,300 kcal/day who reduces intake to 1,700 kcal creates a 600 kcal/day deficit. Over eight weeks that’s approximately 33,600 kcal—roughly 4.4 kg of fat using the 7,700 kcal/kg estimate—plus any additional NEAT or exercise.
• Adding NEAT (e.g., an extra 2,000–3,000 steps per day) and two structured workouts weekly can bridge the remaining deficit.

Caution on extreme diets Severe caloric restriction below recommended thresholds or eliminating food groups entirely undermines long‑term compliance and health. If medical conditions exist—thyroid disease, diabetes, eating disorders—consult a healthcare professional before undertaking major dietary changes.

The Role of Sleep, Stress and Timing in Weight Change

The nightly timing of Maru’s routine raises questions about sleep, recovery and late‑night behaviors.

Sleep quality and appetite regulation

• Poor sleep raises ghrelin (hunger hormone) and suppresses leptin (satiety hormone), increasing appetite and preference for energy‑dense foods. Improving sleep duration and timing supports weight loss without changing intake.
• A calming, low‑intensity bedtime routine can signal the body to wind down, supporting deeper sleep and less late‑night snacking.

Stress and cortisol

• Chronic stress elevates cortisol, which drives visceral fat retention in some individuals and increases appetite for high‑sugar, high‑fat foods.
• Low‑stress exercise and brief mobility work—like Maru’s—can reduce perceived stress. Pairing consistent movement with sleep hygiene supports hormonal balance.

Meal timing and late‑night eating

• Late large meals can disrupt sleep. A short pre‑bed routine may act as a breakpoint between daytime eating and sleep, discouraging additional food.
• Time‑restricted feeding (e.g., 10–12 hour eating window) is a tool many people use to reduce late caloric intake. The routine could help maintain such a window by creating a ritual before sleep.

Who Benefits Most from This Routine — Matching Goals to Practice

The routine suits several populations but is not universal.

Best candidates

• Sedentary office workers seeking to reduce stiffness, improve core activation and establish a consistent movement habit.
• Beginners who lack time or confidence to start longer exercise programs and need a low‑barrier entry point.
• People prioritizing mobility, posture correction and gentle core strengthening rather than rapid fat loss.

Less suitable

• Individuals seeking aggressive fat loss without changing diet or increasing broader physical activity.
• People with specific spinal pathologies, herniated discs, or severe hip flexor tightness where supine leg manipulations may aggravate symptoms. Medical clearance is advisable.
• Those needing structured resistance training for athletic performance—one minute is insufficient for strength gains across major muscle groups.

Modifications for common limitations

• Lower back pain: replace supine cycling with dead‑bug variations that emphasize neutral spine and single‑leg movements while reducing lumbar torque.
• Neck discomfort: keep hands lightly supporting the head and avoid pulling; perform a chin‑tuck to engage neck stabilizers gently.
• Limited hip flexor mobility: reduce leg lift range or perform partial lifts until mobility improves.

The Daytime Stretches — Purpose and Execution

Maru recommends two daytime mobility exercises to offset prolonged sitting. Both are brief, practical and can be done at the office.

Standing cross‑body torso twist (three sets of 20 reps per side)

• Execution: Stand feet hip‑width, rotate the torso across the body while keeping hips square. Perform 20 repetitions each side in three sets, ideally spread through the day.
• Benefits: Activates obliques, mobilizes the thoracic spine and interrupts static posture. The volume (60 reps per side) emphasizes range of motion and reflexive core activation.

Kneeling reach and draw back (hip lowering stretch)

• Execution: Kneel, arms extended forward, then draw the arms back while lowering the hips toward the heels. Hold briefly at the bottom to feel shoulder, hip and upper‑back stretch.
• Benefits: Relieves anterior chain tightness (shoulders and hips) common after long sitting. The movement restores length in the hip flexors and improves overhead mobility indirectly supporting exercise efficiency.

Practical integration

• Use calendar reminders to perform these stretches mid‑morning and mid‑afternoon. Three minutes total per session is sufficient.
• Combine stretches with standing breaks, short walks, or stair climbs to boost NEAT.

Turning One Minute into a Sustainable Program — Progression, Variations and Weekly Structure

To convert a nightly minute into measurable fitness gains, build in progression and variety.

Progression roadmap (8 weeks) Weeks 1–2: Establish habit

• One minute nightly (the four moves, 10s each).
• Two daily stretch breaks.
• Add daily step goal: baseline + 2,000 steps.

Weeks 3–4: Double the volume

• Two rounds of the one‑minute circuit (2 minutes total) on at least five nights per week.
• Add two 20–30 minute brisk walks early in the week.
• Introduce one 20–25 minute full‑body resistance session (bodyweight or band) to begin loading larger muscle groups.

Weeks 5–6: Increase intensity and complexity

• Three rounds on five nights per week; increase each move to 15 seconds.
• Two resistance training sessions per week focusing on compound lifts: squats, push variations, rows (bodyweight or with dumbbells).
• 30–40 minute moderate cardio session once per week (bike, brisk walk, jog).

Weeks 7–8: Consolidate gains

• Four rounds of the circuit or replace one round with a 45–60 second plank.
• Maintain two strength sessions, one cardio session, and daily NEAT target.
• Reassess diet and adjust caloric intake to preserve energy and performance.

Variations and advanced options

• Add tempo manipulation: slow eccentric (lowering) phases increase time under tension and muscle stimulus.
• Introduce unilateral core work (single‑leg raises, side planks) to address asymmetries.
• Replace supine cycling with bicycle crunches at higher tempo for conditioning days.

Weekly sample plan (intermediate)

• Monday: Core circuit (2–3 rounds), strength session A (lower body emphasis), 30‑minute walk
• Tuesday: Core circuit (1–2 rounds), mobility breaks, light day
• Wednesday: Core circuit (2 rounds), strength session B (upper body emphasis), 20‑minute interval walk
• Thursday: Core circuit (1–2 rounds), active recovery: yoga/stretching
• Friday: Core circuit (2–3 rounds), full‑body strength, brisk 30‑minute walk
• Weekend: One longer active session (hike, bike), rest and mobility

Measuring progress

• Use objective markers beyond the scale: waist circumference, photos taken under consistent conditions, strength improvements, how clothes fit, and energy levels.
• Track adherence: if a one‑minute routine increases overall activity and dietary compliance, the behavioral change is the primary win.

Nutrition in Practice: Sample Day and Simple Templates

Below are practical meal templates and a sample day that supports a moderate deficit. Tailor portions to individual needs based on body size, activity and goals.

Guiding macronutrient targets

• Protein: 1.2–1.6 g/kg body weight daily to preserve lean mass.
• Fats: 20–35% of calories, emphasizing unsaturated sources.
• Carbohydrates: fill remaining calories, prioritizing whole grains and fiber for satiety.

Sample 1,600–1,800 kcal day (adjust up or down) Breakfast (350–400 kcal)

• Greek yogurt (150 g) with mixed berries (100 g) and a tablespoon of chopped nuts.
• Coffee or tea, black or with minimal milk.

Mid‑morning snack (100–150 kcal)

• A small apple or a rice cake with 1 tbsp almond butter.

Lunch (450–500 kcal)

• Grilled chicken or tofu salad: mixed greens, quinoa (½ cup cooked), roasted vegetables, 1 tbsp olive oil and lemon dressing.
• Sparkling water or tea.

Afternoon snack (150 kcal)

• Cottage cheese or a boiled egg and carrot sticks.

Dinner (450–500 kcal)

• Baked salmon or tempeh, steamed greens and sweet potato (150 g cooked), drizzle of olive oil.

Evening (optional, ≤100 kcal)

• Herbal tea and a small piece of dark chocolate or a steamed edamame portion.

Meal timing tips

• Prioritize protein at each meal to maximize satiety and support muscle repair.
• Avoid large meals immediately before sleep that may disrupt rest.
• If hunger is a problem in the evening, shift calories earlier in the day and include a protein‑rich late snack.

Supplements — pragmatic choices

• Protein powder can help hit targets when whole food is impractical.
• Vitamin D and a basic multivitamin may be warranted if dietary variety is limited; consult a clinician for tailored advice.

Safety Considerations and Common Mistakes

Even low‑impact routines carry risk when performed with poor technique or unrealistic expectations.

Common mistakes

• Overestimating calorie burn from short routines and underestimating dietary intake. Assuming the minute opens license for high‑calorie snacks undermines progress.
• Performing movements with neck or lumbar strain. If pain arises, stop and reassess form or consult a clinician.
• Stagnation: repeating the same one minute forever without progressive overload will yield diminishing returns for strength or metabolic change.

Safety practices

• Prioritize movement quality over quantity. Controlled contractions reduce injury risk.
• Warm up briefly if performing the routine as part of a longer session; a few mobility drills or marching in place suffices.
• Gradually progress volume and intensity. Sudden spikes in activity increase injury risk.
• Seek professional guidance if you have cardiovascular disease, uncontrolled hypertension, recent surgery, or pregnancy.

Pregnancy and postnatal considerations

• Many core exercises must be modified during pregnancy and the postnatal period to protect the pelvic floor and avoid intra‑abdominal pressure spikes.
• Diastasis recti (abdominal separation) is common postpartum; gentle pelvic floor activation and tailored guidance from physiotherapists are recommended.

Real‑World Examples: How Small Routines Led to Bigger Changes

Several reputable coaches and rehabilitation physiotherapists report that tiny, consistent practices catalyze broader change. The key pattern repeats: a short, achievable habit reduces friction for movement, which then grows into greater daily activity and nutritional awareness.

Example A: Office worker to habitual mover

• Baseline: sedentary, 1–2 short walks per week, frequent late‑night snacks.
• Intervention: 60‑second bedtime core and two daytime stretch breaks.
• Outcome over 12 weeks: consistent sleep improved, late‑night snacking decreased, step count rose by 3,000/day and the individual added two weekly resistance sessions. Result—6–7 kg weight loss and improved posture.

Example B: Beginner to strength trainee

• Baseline: young adult with minimal gym experience.
• Intervention: nightly one‑minute routine as an entry habit. After three weeks, motivation increased; the person joined a local gym and began two 45‑minute strength sessions per week.
• Outcome: Over four months, body composition changed substantially, and the core routine remained as a warm‑up and neuromuscular priming tool.

These examples underscore a recurring principle: the minute itself rarely creates dramatic weight loss. Its strategic value lies in reducing barriers so that people make the other changes—diet, daily movement, progressive exercise—necessary for larger gains.

Practical Tools: Tracking, Accountability, and Adjustments

Sustained progress depends on measurable feedback and flexible adjustments.

Tracking options

• Scale: use weekly averages rather than daily readings to avoid water fluctuation noise.
• Tape measure: waist at the navel provides a useful body composition marker independent of weight.
• Performance markers: hold times for planks, number of reps at consistent load, and subjective energy levels reveal fitness improvements.
• Habit logs: mark off days you completed the one‑minute routine to reinforce adherence.

Accountability strategies

• Social accountability: exercise with a friend or post progress to a private group for encouragement.
• Micro‑goals: celebrate weekly adherence rather than only the destination weight.
• Environmental cues: place a yoga mat near the bed as a visual reminder, set a phone alarm, or prepare workout clothes to reduce friction.

Adjustments for plateaus

• Reassess diet with a short food diary to identify hidden calories.
• Increase NEAT: take walking meetings, stand during calls, park further away.
• Add progressive resistance training to preserve lean mass and increase metabolic demand.
• Consider a short planned calorie refeed or slight calorie reduction under professional guidance if progress stalls for many weeks.

Frequently Asked Questions (FAQ)

Q: Can a one‑minute routine alone cause big weight loss? A: Not typically. The minute provides core activation, mobility and habit formation. Significant weight loss—like 7.5 kg in eight weeks—mostly comes from sustained calorie deficit, increased daily activity and additional structured exercise. The routine is a useful piece in a broader strategy.

Q: How many calories does the one‑minute routine burn? A: Minimal—likely in the single digits per minute depending on body size and intensity. Its effectiveness derives from consistency, improved movement quality and possible reductions in late‑night eating rather than direct caloric burn.

Q: Is it safe to do these movements every night? A: For most healthy adults, yes—if performed with correct form. If you have back pain, herniated discs, pelvic issues or recent surgery, seek medical clearance and consider modified versions such as dead‑bugs, pelvic tilts or isometric holds.

Q: Should I shorten or skip meals to make faster progress? A: Severe restriction increases risk of muscle loss, metabolic slowdown and poor adherence. A moderate, sustainable deficit paired with adequate protein intake and resistance training yields better long‑term outcomes.

Q: How soon will I see changes in waist definition? A: Visible changes depend on starting body composition, diet, genetics and adherence. Some people notice improved posture and slightly firmer abdominal feel within two to four weeks; measurable fat loss typically requires consistent effort over several weeks to months.

Q: How do I progress the routine when it becomes easy? A: Increase rounds, lengthen time per movement (e.g., from 10 to 20 seconds), add tempo variations, or incorporate plank variations and unilateral core work. Introduce resistance training for greater systemic effects.

Q: Can this routine replace a gym program? A: Not if your goals include substantial strength gains across large muscle groups. The minute is a complement to a structured resistance program. For general health, mobility and modest toning it is a helpful and time‑efficient practice.

Q: What about the two daytime stretches—are they necessary? A: They are useful adjuncts. For people sitting for long periods, brief mobility breaks reduce stiffness and restore range of motion, which supports posture and reduces injury risk during daily life and workouts.

Q: How should I combine the routine with cardio? A: Use the minute as a nightly anchor while scheduling 2–3 cardio sessions weekly according to your fitness level—brisk walks, cycling or interval training. Cardio raises total energy expenditure and complements dietary efforts.

Q: Any special guidance for older adults? A: Focus on movement quality, balance and low impact variations. Emphasize progressive strength training for bone and muscle health. Modify supine leg raises if hip mobility or spinal issues are present.

Q: Is there evidence that short daily bouts are effective? A: Evidence supports that micro‑sessions and accumulated activity increase total daily energy expenditure and can improve metabolic markers when combined with dietary changes. The strength of evidence for fat loss from a single 1‑minute core routine alone is weak; it is the overall behavioral package that matters.

Consistency, technique and a supportive dietary strategy convert modest nightly practices into meaningful results. Maru’s one‑minute routine succeeds as a behavioral lever: it reduces the friction of starting exercise, addresses sedentary stiffness and builds a daily ritual that often leads to broader change. For those who want to use it as a springboard, the most productive path combines the minute with incremental increases in activity, structured resistance, careful nutrition and attention to recovery.