Building Capacity for Young Swimmers: A 22-Week, Four-Stroke Interval Plan for 9–14 Year Olds

Table of Contents

1. Key Highlights
2. Introduction
3. Why capacity (base) building matters for 9–14 year olds
4. The interval framework: 25s for four strokes and three skill levels
5. Session templates: warm-up, skill block, main set, sprint/conditioning, cool-down
6. Sample practice built from the coach’s brief: "Simple introduction interval training for all 4 strokes w/ 25’s for 3 separate skill levels."
7. Periodizing 22 weeks: a practical macrocycle
8. Stroke-specific technique cues for 25s
9. Dryland and injury prevention for young athletes
10. Monitoring progress: practical tests and metrics
11. Nutrition and recovery tailored to 9–14 year olds
12. Coaching management: practice flow, lane assignments, and behavior expectations
13. Equipment choices for 25s and technique work
14. Troubleshooting common issues
15. Two hypothetical case studies: applying the framework
16. Implementing the 22-week plan: a sample week-by-week outline
17. How coaches can use data and technology without losing the human element
18. Common coaching cues that translate well across ages
19. FAQ

Key Highlights

• A simple, scalable interval workout framework that builds aerobic capacity across all four strokes using repeated 25-yard efforts tailored to three skill levels.
• A 22-week periodized plan that transitions from base endurance to race readiness, with specific session templates, technique cues, dryland prescriptions, and monitoring tools for coaches and parents.

Introduction

Developing a strong aerobic base during the age-group years sets the foundation for long-term success in competitive swimming. For 9–14 year olds, capacity work should balance volume with technique reinforcement, avoid excessive intensity, and remain engaging enough to sustain motivation. The workout model below adapts a straightforward interval approach—25-yard repeats for the four competitive strokes—across three skill tiers. It fits a 25-yard pool and aligns to a 22-week window leading to a target meet, enabling coaches to build general capacity, refine stroke-specific mechanics, and prepare young athletes for the demands of competition without overreaching.

The following material repurposes a coach’s brief interval workout into a comprehensive training resource. It expands single-session notes into a full season plan, offers session templates for daily practice, prescribes dryland and recovery, and provides practical coaching tips. The goal: a usable blueprint that clubs and teams can adapt, whether they use Commit Swimming, SwimSwam resources, or in-house planning.

Why capacity (base) building matters for 9–14 year olds

Young swimmers are in a prime developmental window for building aerobic capacity while learning efficient movement patterns. Three factors justify prioritizing base work at this stage:

• Physiological adaptation: Aerobic conditioning improves capillary density, mitochondrial function, and the ability to clear lactate at submaximal intensities. These adaptations improve recovery between repeats and lay the groundwork for later speed specialization.
• Skill consolidation: Repetition at controlled intensities gives swimmers the time to groove efficient stroke mechanics. Unlike high-intensity sprinting, base work allows coaches to cue technique and allow adjustments without the distortion of severe fatigue.
• Injury prevention and longevity: Progressive, age-appropriate volume increases with emphasis on technique reduce the risk of overuse injuries while keeping training sustainable across seasons.

Best practice places the emphasis on volume at moderate intensity, frequent technical checks, and variety so young athletes remain engaged. Repeated 25-yard efforts—short enough to maintain focus, long enough to develop rhythm—fit these criteria for a 25-yard pool.

The interval framework: 25s for four strokes and three skill levels

The core session concept is straightforward: interval training using 25-yard repeats for freestyle, backstroke, breaststroke, and butterfly. Intervals are adjusted to the swimmer’s skill level. That keeps groups training together while receiving differentiated loads.

Three skill tiers

• Advanced (13–14, higher training age): Shorter rest, higher tempo, focus on race-specific speed and efficiency.
• Intermediate (9–14, developing technique and stamina): Moderate rest, focus on stroke mechanics under manageable pressure.
• Developmental (9–12, early stage): Longer rest, emphasis on quality reps, drills, and consistent pacing.

Typical interval prescriptions (examples for coaches to adapt)

• Advanced: 25s on 30–40 seconds interval (e.g., on 35s), done at 85–95% effort when required for speed sets; for capacity work, aim 75–85% with controlled turnover.
• Intermediate: 25s on 40–55 seconds (e.g., on 45s), focus on steady tempo and clean turns.
• Developmental: 25s on 55–70 seconds (e.g., on 60s), frequent drill repeats and rest to maintain quality.

Rationale for 25s

• Attention span and execution: Swimmers maintain technical focus across short distances.
• Modular programming: Coaches can combine 25s into 50s, 100s, and IM sets to target different energy systems while keeping a consistent unit of measurement.
• Pool compatibility: Matches a 25-yard course common to many U.S. programs.

Session templates: warm-up, skill block, main set, sprint/conditioning, cool-down

Below are adaptable session templates using the 25s framework. Each session can be scaled by repetition count, rest intervals, and intensity to match the three skill tiers and weekly training emphasis.

Session A — Base endurance + technique (total ~2,200–3,000 yards depending on level)

• Warm-up (15–20 minutes)
  • 200 free easy
  • 4 × 50 (choice stroke/drill) on 1:00–1:15
  • 6 × 25 kick (choice) on :45–1:00
• Skill block (12–15 minutes)
  • 8 × 25 drill-swim (odd: drill, even: swim) IM order on generous rest (e.g., :45–1:15)
    Drill choices: fingertip drag/free catch-up (free), single-arm/backstroke balance, 2-kicks-1-pull breast, body dolphin/butterfly timing.
• Main set (30–40 minutes)
  • 4 × (4 × 25 by stroke) on interval according to tier
    Example per group: Advanced on 35s, Intermediate on 45s, Developmental on 60s
    Rotate strokes: Free / Back / Breast / Fly. Focus: consistent pace, efficient starts and turns.
  • Repeat sequence 3–6 times depending on volume target.
• Secondary set (conditioning, 10–12 minutes)
  • 8 × 25 descending by effort across each 4-stroke rotation—focus on speed preservation without dramatic technique change. Rest as needed.
• Cool-down (6–10 minutes)
  • 200 easy IM order or mixed choice

Session B — Aerobic speed and tempo (total ~2,400–3,400 yards)

• Warm-up
  • 300 mixed (100 free, 100 kick, 100 pull)
  • 6 × 25 build on :45
• Tempo/threshold skill block
  • 10 × 25 with tempo trainer or metronome at prescribed stroke rate (control emphasis), rest short.
• Main set (interval challenge)
  • 10 × 25 swim on a challenging interval (e.g., advanced on 40s) followed by 5 × 50 easy recovery. Repeat as appropriate.
• Sprint primer
  • 6 × 25 fast (start from push) with full recovery for neuromuscular recruitment.
• Cool-down
  • 200–300 easy

Session C — IM emphasis and race preparation (total ~2,000–2,800 yards)

• Warm-up
  • 200 free, 200 IM drill
  • 6 × 25 kick (choice)
• IM skill block
  • 8 × 25 IM order focusing on transitions and stroke-specific breakouts.
• Main set (IM 25 repeats)
  • 5 × (4 × 25 IM order) on interval by tier, concentrate on smooth turns and legal strokes.
  • Add 4 × 50 IM broken by stroke for builds.
• Race simulation
  • 3 × 25 from dive, max effort, full recovery.
• Cool-down
  • 200 easy

Programming notes

• Volume targets for training week depend on age and group. For 9–12 developmental swimmers, weekly yardage might range 6,000–10,000 yards across 4–6 sessions; for advanced 13–14 swimmers, weekly yardage could sit 10,000–18,000 yards across similar frequency. Use season goals and athlete maturity to guide specifics.
• Maintain at least one recovery day per week and one shorter recovery swim session to consolidate adaptation.

Sample practice built from the coach’s brief: "Simple introduction interval training for all 4 strokes w/ 25’s for 3 separate skill levels."

This sample session mirrors the coach note and demonstrates how a single practice can address technique, capacity, and graded intensity across three groups.

Overall plan: 2,400 yards approximate for intermediate; adjust repeats up or down for advanced and developmental.

Warm-up (400)

• 200 swim easy (choice)
• 4 × 50 (25 drill / 25 swim) on 1:10
• 4 × 25 kick on :45

Technique set (400)

• 3 × (4 × 25 drill-swim by stroke) on generous rest
  Example: 25 drill free (fingertip drag), 25 swim free; 25 back drill (single arm), 25 back swim; etc.

Main interval block — 25s across strokes (1,200)

• 3 rounds of:
  • 4 × 25 (Free, Back, Breast, Fly) on interval by group
    • Advanced: on 35s — aim for 75–85% effort for endurance block
    • Intermediate: on 45s — emphasize rhythm, consistent splits
    • Developmental: on 60s — work on stroke quality, turns, relaxed tempo
  • 1 × 100 easy recovery (choice) after each 4×25 cluster

Speed/skills finish (200)

• 8 × 25 descending 1–4 and 5–8 (stroke rotation), full recovery for top quality.

Cooldown (200)

• 200 easy relaxed swim

Coaching emphasis

• Count breaths on the first 25 of the round and try to be steady across repeats.
• Cue a consistent break-out distance off each wall (e.g., breakout by 12–15 yards on free/back depending on ability).
• Use the 100 recovery to assess stroke feel—should be easy enough to reset mechanics.

This session fits a 25-yard pool and maintains manageable focus bursts. It also allows coaches to coach each stroke in short bursts and provide immediate feedback between repeats.

Periodizing 22 weeks: a practical macrocycle

With 22 weeks until a target meet, coaches can construct a macrocycle that flows from general capacity to specificity. Use the following block structure and sample emphasis per block:

Block 1 — Base phase (Weeks 1–12; 12 weeks)

• Goals: Establish aerobic platform, consistent technique, gradual volume increases, introduce interval structure.
• Focus: Long aerobic sets at controlled intensity, many technical repetitions, foundational dryland emphasizing mobility.
• Example weekly layout: 4–6 pool sessions, 2 dryland sessions (light strength, core, mobility), weekly time trials for pacing checks.

Block 2 — Build phase (Weeks 13–18; 6 weeks)

• Goals: Convert base into higher lactate tolerance and race-pace capacity, increase threshold-related training, begin race-specific work.
• Focus: Faster 25s and 50s, reduced rest, tempo training, more race-turn work, introduce pacing sets and controlled sprinting.
• Example: Replace a proportion of long aerobic sets with threshold repeats (e.g., 10 × 100 at 75–85% with short rest) and maintain stroke-specific intervals.

Block 3 — Sharpen/pre-competition (Weeks 19–20; 2 weeks)

• Goals: Fine-tune speed and race skills, nail starts and breaks, reduce overall volume but keep intensity.
• Focus: Race-pace repetitions, race simulation, taper basics starting at end of this block.

Block 4 — Taper/peak (Weeks 21–22; 2 weeks)

• Goals: Reduce fatigue while preserving neuromuscular readiness and speed.
• Focus: Cut volume 30–50% depending on athlete and meet duration; maintain short, high-quality sprints; emphasize rest, nutrition, and mental prep.

Why 12 weeks base?

• For developing athletes, longer base phases ensure durable aerobic adaptations without early specialization. Twelve weeks consolidates capacity and establishes training habits.

Monitoring progress across blocks

• Schedule periodic performance checks: 200 or 400 time trials at the end of each 4-week sub-block to monitor improvements.
• Track subjective measures (RPE, sleep quality, mood) and objective ones (training pace, interval adherence, stroke counts).

Stroke-specific technique cues for 25s

Short repeats highlight common technical faults. Below are concise, actionable cues for each stroke tailored to young swimmers.

Freestyle

• High elbow entry: Enter fingertips first, lead with fingertips, elbow bends on catch.
• Streamlined breakouts: Press on the streamline underwater, start the breakout with a long glide into controlled strokes.
• Balanced breathing: Breathe every 3rd or 4th stroke during base work to encourage bilateral symmetry; during speed sets, switch to athlete’s preferred pattern.

Backstroke

• Head and hips line: Eyes look straight up, ears in water, hips near the surface to reduce drag.
• Continuous kick: Small stable flutter kick from the hips with minimal knee bend.
• Straight-arm finish checkpoints: Finish under the shoulder rather than crossing the midline.

Breaststroke

• Timing over power: Emphasize glide after the kick; timing should be kick → glide → pull → glide.
• Narrow kick focus: Avoid wide splay; keep feet together and drive with hips.
• Recovery close to surface: Arms should recover forward just under or at the surface to reduce resistance.

Butterfly

• Whole-body timing: Two kicks per arm cycle—one at/behind entry and one at/exit—maintain rhythm.
• Pressed hip action: Use the core and hips to generate undulation; hands should recover low and close to the water.
• Controlled breathing: Breathe early on the pull and return head quickly to neutral.

Coaching technique drills for 25s

• 25s are ideal for focused drill-swim sequences: 12.5 drill / 12.5 swim, or 25 drill then 25 swim. Keep cues specific and demonstrate visually.

Dryland and injury prevention for young athletes

Dryland supports stroke power, body awareness, and injury resilience. For 9–14 year olds, prioritize mobility, general strength, and movement quality over max load lifting.

Weekly dryland framework (2 sessions recommended)

• Session 1 — Mobility and core (20–30 minutes)
  • Dynamic warm-up (hip circuits, shoulder circles)
  • Core circuit: planks (front/side), dead-bugs, bird-dogs (3 × 30 seconds each)
  • Flexibility: thoracic rotations, hip flexor stretches
• Session 2 — Functional strength and plyometrics (25–35 minutes)
  • Bodyweight squats and lunges, single-leg step-ups (3 sets × 8–12)
  • Push/pull balance: banded rows, push-ups (3 × 8–12)
  • Light power: medicine ball chest passes, squat jumps (2–3 × 6–8)
  • Finish with mobility cooldown

Guidelines

• Avoid heavy unilateral loading for pre-adolescent athletes; focus on coordination and progressive resistance tailored to maturation.
• Emphasize scapular stability and rotator cuff endurance to combat shoulder overload.
• Integrate injury prevention cues into pool time: balance stroke counts and ensure adequate warm-up before sprint work.

Common overuse risks and mitigation

• Shoulder pain: Reduce volume of paddles/drag if pain emerges, emphasize technique and rotator cuff strengthening, and consider reduced dryland pushing volume.
• Knee pain from breaststroke: Monitor breaststroke kick volume and teach hip-driven kick mechanics to reduce valgus knee motion.
• Overtraining: Watch mood, appetite, and sleep—incorporate recovery days and reduce high-intensity sets when signs appear.

Monitoring progress: practical tests and metrics

Objective and subjective monitoring helps coaches adapt training and avoid burnout.

Objective metrics

• Time trials: 100 or 200 depending on age and event focus, run every 4–6 weeks.
• Stroke count and rate: For 25s, measure average stroke count and use a tempo trainer for rate.
• Split consistency: Track variation across repeated 25s to measure pacing control.

Subjective metrics

• RPE (Rate of Perceived Exertion): Use a 1–10 scale post-set. Young swimmers can be trained to use RPE alongside coach observation.
• Wellness questionnaire: Quick daily check-in on sleep, mood, muscle soreness, and appetite.

Using the data

• If times plateau while wellness declines, reduce intensity or volume for a microcycle.
• Improvements in stroke count at constant speed indicate technical gains.
• Repeat 25s with smaller standard deviation in splits is evidence of improved pacing and capacity.

Nutrition and recovery tailored to 9–14 year olds

Fueling supports training volume and maturation. For young athletes, consistency and quality of meals matter more than supplements.

Daily nutrition principles

• Balanced meals: Include lean proteins, complex carbohydrates, healthy fats, and fruits/vegetables.
• Pre-training snack (30–60 minutes before): Easily digestible carbs—banana, toast, yogurt.
• Post-training refuel (within 30–60 minutes): Carbohydrate-plus-protein (chocolate milk, turkey sandwich, Greek yogurt and fruit).
• Hydration: Encourage water before, during, and after practice; for sessions longer than 75 minutes, introduce a low-concentration sports drink.

Sleep and recovery

• Sleep is non-negotiable. Aim for 9–11 hours for 9–12 year olds and 8–10 hours for teens.
• Active recovery: Light swims, mobility sessions, and family-led relaxation activities aid regeneration.

Supplemental considerations

• Most growth needs are met through food. Vitamin D or iron supplementation should be considered only after screening and professional consultation.
• Caffeine and stimulants should be avoided in younger athletes.

Coaching management: practice flow, lane assignments, and behavior expectations

Practical organization maximizes time on skill and volume without losing control.

Lane grouping ideas

• Assign lanes by skill tier and rotate assignments to keep athletes swimming with peers of similar ability.
• Use a lane with coach presence for the developmental group to provide frequent feedback.

Interval management

• Use lane clocks prominently and standardize intervals in advance. Place tempo trainers and visual countdown cues for consistent starts.
• For multisession teams, provide printed or whiteboard workouts with rest intervals and target paces.

Feedback loops

• Provide immediate, specific feedback between repeats rather than broad corrective lectures. A single cue like "keep elbows high on entry" after each 25 yields faster adoption than multiple corrections.

Safety and behavior

• Enforce a consistent warm-up and cool-down to reduce injury risk.
• Ensure emergency protocols and lifeguard coverage are in place; check that gates, deck, and ladders are safe.

Using Commit Swimming and SwimSwam resources

• Commit Swimming can host shared workouts and provide interval templates. Use shared links for parents and swimmers to reference prescribed sets and rest.
• SwimSwam’s daily workouts offer additional variety and can supplement in-season sessions.

Equipment choices for 25s and technique work

A modest set of tools augments coaching and technique work without dominating training time.

Recommended equipment

• Fins (short and medium) for drills and tempo: aid body position and leg drive.
• Pull buoy for arm focus, with attention to avoiding overuse because it alters hip position.
• Paddles (careful use): short-term for strength, not daily for young shoulders. Limit to specific sets with robust warm-ups.
• Snorkel for uninhibited focus on stroke rhythm and head position during base sets.
• Tempo trainers to set cadence and help swimmers internalize stroke rate.

Equipment application

• Use snorkel and fins during tech sets to isolate feel.
• Save paddles for short intervals and advanced swimmers to avoid shoulder stress.
• Adopt a "toolbox" approach: use equipment to solve specific issues rather than as a crutch.

Troubleshooting common issues

Training young athletes presents predictable challenges. Here are solutions to recurring themes.

Issue: Swimmers lose technique as sets progress

• Solution: Shorten repeats, increase rest, or reduce overall reps. Insert drill-swim sequences and recovery reps to reinforce feel.

Issue: Motivation dips mid-base phase

• Solution: Add fun elements—relay challenges, stroke circuits, or themed days. Keep technical objectives clear so athletes feel progress.

Issue: Shoulder pain appears early in season

• Solution: Stop high-resistance tools (paddles), de-emphasize high-volume fly and breaststroke until pain resolves, prescribe rotator cuff endurance work, and consult medical professionals.

Issue: Wide variation in training adherence among swimmers

• Solution: Differentiate workloads more clearly; provide clear expectations and individual targets within group sessions. Use time trials to create personalized goals.

Two hypothetical case studies: applying the framework

Case A — Emily, advanced 13-year-old Profile: Trains 5 times per week, comfortable with pace work, targets 100/200 free and 100 IM. Application:

• Weekly structure: 5 pool sessions plus 2 short dryland sessions. Volume ~14,000 yards.
• Interval prescription: Advanced intervals (25s on 30–40s depending on effort). Incorporate threshold 100s and sprint work.
• Monitoring: 200 time trial every 4 weeks; stroke count logged weekly.
• Outcome measure: Drop in 200 time with improved stroke count and steady RPE.

Case B — Marcus, developmental 10-year-old Profile: Trains 4 times per week, learning strokes, enjoys relays. Application:

• Weekly structure: 4 pool sessions plus 1 dryland focusing on mobility and game-based strength. Volume ~7,000–8,500 yards.
• Interval prescription: Developmental intervals (25s on 55–70s). Emphasis on drills and fun sets. Use snorkel and fins for instruction.
• Monitoring: Coach uses split consistency and qualitative assessment of technique improvements.
• Outcome measure: Steady improvement in 25 and 50 times, improved breathing under control, and consistent attendance.

These profiles show how the same template fits different maturation and skill levels by changing rest, volume, and coaching focus.

Implementing the 22-week plan: a sample week-by-week outline

This condensed outline shows weekly emphasis across the 22-week macrocycle.

Weeks 1–4 (Base introduction)

• Emphasis: Technique, aerobic foundation, low-intensity 25s, core dryland.
• Key drill: 3 × 4 × 25 drill-swim per practice.

Weeks 5–8 (Base consolidation)

• Emphasis: Increase volume 5–15% per 2-week block, add longer sets (6 × 50–100).
• Key drill: Tempo and breakout focus.

Weeks 9–12 (Base peak)

• Emphasis: Highest low-intensity volume; introduce race-pace 25s at end of sets.
• Key drill: Turn and breakout practice; 1 time trial.

Weeks 13–15 (Build I)

• Emphasis: Shorter rest, more threshold work, lactate building.
• Key drill: Controlled descending sets and 50s on tight rest.

Weeks 16–18 (Build II)

• Emphasis: Rapid pace sets, race-specific simulations, starts and finishes.
• Key drill: 25s from dive with race recovery.

Week 19–20 (Sharpen)

• Emphasis: Maintain intensity, reduce volume 10–25%, focus on speed and form.
• Key drill: Sprint-specific neuromuscular sets, race strategy work.

Week 21–22 (Taper and meet)

• Emphasis: Volume down 30–50%, retain short high-quality efforts, emphasize rest, nutrition, and mental readiness.
• Key drill: Short max-effort 25s with full recovery, then rest.

Adjustments

• Individualize for athletes showing high fatigue or peaking early. Conservative adjustments generally better than aggressive increases.

How coaches can use data and technology without losing the human element

Tools like Commit Swimming deliver shared workouts and interval timing, while wearable tech provides heart rate and stroke metrics. Use these tools to augment coaching decisions—not replace observation and conversation.

Best practices

• Share workouts in advance via platforms for swimmer and parent transparency.
• Use wearables selectively for trend data (e.g., resting HR, weekly training load).
• Keep one-on-one check-ins to contextualize numbers with how the athlete feels.

Common coaching cues that translate well across ages

Short, memorable cues are effective:

• "Long and light" (freestyle): Stretch your stroke, minimize splash.
• "Kick from the hips" (back/fly): Reduce knee choppiness.
• "Chest forward, glide" (breaststroke): Aim for a glide phase after the kick.
• "Quiet hands" (all strokes): Entry and exit should be controlled.

These cues pair well with immediate demonstration and visual feedback from a coach or video.

FAQ

Q: How often should swimmers repeat time trials during a 22-week build? A: Schedule time trials every 4–6 weeks. Early in the base phase, use shorter trials (100), moving to 200 or event-specific trials as the build progresses. Time trials should inform training adjustments, not drive weekly workouts.

Q: How to balance stroke development when swimmers favor freestyle? A: Rotate stroke emphasis across the week and include short stroke-specific main sets that reward stroke proficiency (e.g., IM relays, stroke ladders). Make non-free strokes engaging through relays and goal-oriented tasks.

Q: When is it appropriate to introduce paddles and increased resistance? A: After consistent base technique and a robust warm-up. Limit paddle use to specific sets—short repeats with full recovery—and avoid daily use in younger athletes. Monitor shoulder comfort closely.

Q: How do you adapt the 25s framework for an older pool or long course? A: Convert 25-yard repeats into 25- or 50-meter/yard efforts to match pool length. For 50-meter pools, treat each 25 as the core unit and build sets using 50s and 100s that preserve the same work-to-rest ratios.

Q: What indicators signal a need to reduce training load? A: Persistent high RPE, declining performance in time trials, elevated resting heart rate, disrupted sleep, increased irritability, or recurring pain. Reduce volume or intensity for a week and reassess.

Q: How much dryland is too much for 9–12 year olds? A: Keep dryland sessions focused, under 30–35 minutes, and limit high-impact or heavy-resistance work. Two short sessions per week emphasizing mobility, core, and light functional strength suffice for most.

Q: How should parents support capacity training at home? A: Ensure proper nutrition and sleep, foster consistent attendance, and reinforce recovery habits. Keep conversations positive and process-focused rather than time- or place-driven.

Q: What role do drills play in short repeat sets? A: Drills focus attention on isolated elements—catch, hip rotation, timing. Integrate them as 12.5/12.5 or 25-drill/25-swim to immediately apply feel changes to the full stroke.

Q: Can this plan accommodate swimmers specializing in sprint events? A: Yes. Emphasize faster 25s and shorter rest in the build phase, include more race-simulation work, and add neuromuscular speed sets. Maintain base training early on to support sprint endurance.

Q: How do you keep sessions fun to prevent dropout? A: Use varied set formats, relays, games-based skill stations, and individualized goals. Celebrate small improvements and encourage team camaraderie.

This framework turns a compact 25-yard-focused interval session into a full-season plan for young swimmers. It prioritizes capacity, technique, adaptation, and athlete well-being while remaining practical for teams operating in 25-yard pools. Coaches can adapt intervals, volumes, and drill progressions to match their team’s context and individual athlete needs.