Hydration for teen (ages 14-17) doing martial arts
Training-day target 3,050 ml/day. Uniforms (gi, dobok) trap heat, the dojo is often warm, and the culture rewards pushing through — all three produce under-hydration faster than most youth sports.
Quick answer
Hydration for teen (ages 14-17) doing martial arts
EFSA's 2010 reference values assign adolescents aged 14 and older the adult total-water Adequate Intake: 2,500 ml/day (2.5 L) for males and 2,000 ml/day (2.0 L) for females, including water from food as well as beverages under moderate temperature and activity. Needs rise with heat and exercise: measured elite training sweat loss reached ~2.0 L over 90 minutes (~1.35 L/h, 1.37% body-mass loss; Maughan 2004), and both ACSM and FIFA/F-MARC set keeping body-mass loss under 2% as the threshold to avoid, with ~150-200 ml every 15-20 minutes during play.
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Teen athletes (ages 14-17) doing martial-arts training face a different hydration problem than either the general age group or the general sport. Uniforms (gi, dobok) trap heat, the dojo is often warm, and the culture rewards pushing through — all three produce under-hydration faster than most youth sports. Heavy uniforms + sustained movement produce sweat rates of 600-1,000 ml/hour, often more than the athlete recognises because the gi absorbs rather than evaporates the sweat. Full competitive load — multi-session training days, double-headers, and tournament weekends are routine. Target 3,050 ml (3.0 L) of total fluids on a training day — approximately 650 ml above the teen (ages 14-17) baseline to cover the session's fluid loss.
Targets for teen athletes (ages 14-17) doing martial-arts training
Training-day target for teen athletes (ages 14-17): 3,050 ml
Baseline for the teen (ages 14-17) age band is 2,400 ml from IOM pediatric guidance. martial-arts training adds approximately 650 ml on top, covering the ~550 ml lost in a typical 75-minute session.
Source: IOM pediatric fluid intake + sport-specific sweat rate research
Pre / during / post — the only framework that matters
Start the session ahead, not catching up. For this age band and sport: a pre-session dose 60-90 minutes before, scheduled sips during, and weight-based replacement after. Non-training days use the age-band baseline only — don't over-drink on rest days.
Urine colour is the cleanest daily signal
Pale straw by the mid-afternoon bathroom visit means the athlete started the session hydrated. Dark yellow or amber before training means a pre-session 500 ml top-up, not 'just start'.
Age maturity: Full competitive load — multi-session training days, double-headers, and tournament weekends are routine.
Match intake to real session length. A preschooler's 'soccer practice' is structurally different from a teen's — don't apply teen protocols to 5-year-olds, and don't apply preschool protocols to competitive tweens.
Practical tips for this age and sport
- Pre-class: 400 ml in the hour before — warming up in a dry-ish state is critical
- Water station breaks: every 15-20 minutes during the class — 100 ml minimum
- Gradings and competitions: pre-hydrate 48 hours out, not just on the day
- Post-sparring: 300 ml + electrolytes within 10 minutes
- Weigh pre/post for a week to calibrate the athlete's actual sweat rate
- Caffeine + pre-workout products: only with adult guidance; plain water + electrolytes handle 95% of needs
Training-day plan — printable for the sports bag
Enter the athlete's age, weight, and sport. Get a pre/during/post schedule, a bottle-size recommendation, and a 7-day tracker for training weeks. Free, no signup to download.
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Signs of Dehydration
- Dizziness on standing after a hard set — immediate stop, 500 ml, no return without clearance
- Urine darker than light straw before training — pre-session deficit, top up 500 ml before starting
- Performance drop in the last third of the session — classic hydration signal, not 'being tired'
- Headache or nausea during or after training — stop, hydrate, don't push through
Sources & Citations
- 2500 mL/day (male); 2000 mL/day (female) — EFSA assigns adolescents aged 14-17 years the adult total-water Adequate Intake (male / female)[1]
- 2.5 L/day (M) / 2.0 L/day (F) — EFSA consolidated water Adequate Intake table, 14-17 years by sex[2]
- ≥2 of 4 signs ⇒ ≥5% deficit — Gorelick four bedside dehydration signs (capillary refill >2 s, absent tears, dry mucous membranes, ill general appearance); two or more indicate a fluid deficit of at least 5% of body weight[3]
- ~2.0 L / 90 min (~1.35 L/h), 1.37% body-mass loss — Measured elite training sweat loss over 90 min at 24-29 °C[4]
- >2% body-mass loss — Prevent body-water deficit beyond this threshold to avert compromised performance[5]
- ~150-200 ml every 15-20 min — FIFA/F-MARC during-play drinking guidance[6]
- [1]EFSA 2010 Water DRV — EFSA Panel on Dietetic Products, Nutrition, and Allergies (NDA). Scientific Opinion on Dietary Reference Values for water. EFSA Journal. 2010;8(3):1459.DOI: 10.2903/j.efsa.2010.1459
- [2]EFSA DRV Summary Table — EFSA. Summary of Dietary Reference Values — overview table (Adequate Intakes for water, L/day, by age and sex). European Food Safety Authority, January 2017.
- [3]Gorelick 1997 — Gorelick MH, Shaw KN, Murphy KO. Validity and reliability of clinical signs in the diagnosis of dehydration in children. Pediatrics. 1997;99(5):E6.PMID: 9113963DOI: 10.1542/peds.99.5.e6
- [4]Maughan 2004 — Maughan RJ, Merson SJ, Broad NP, Shirreffs SM. Fluid and electrolyte intake and loss in elite soccer players during training. Int J Sport Nutr Exerc Metab. 2004 Jun;14(3):333–46.PMID: 15256693
- [5]ACSM/Sawka 2007 — Sawka MN, Burke LM, Eichner ER, Maughan RJ, Montain SJ, Stachenfeld NS. American College of Sports Medicine position stand. Exercise and fluid replacement. Med Sci Sports Exerc. 2007 Feb;39(2):377–90.PMID: 17277604DOI: 10.1249/mss.0b013e31802ca597
- [6]FIFA F-MARC Consensus 2006 — FIFA F-MARC Consensus (Nutrition for Football). J Sports Sci. 2006;24(7).DOI: 10.1080/02640410500482461
Last reviewed: 2026-06-21. Every figure on this page is sourced to the named primary references above.
Frequently Asked Questions
How much water does a teen kid need on a martial-arts training day?
About 3,050 ml (3.0 L) of total fluids across the day. Baseline for this age band is 2,400 ml, and martial-arts training adds the rest to cover the 75-minute session's fluid loss.
What's the pre / during / post split for this age and sport?
Pre 500-700 ml in the 90-120 minutes before, during 250 ml every 15-20 minutes, post 1.5× any body-weight drop across the next 2 hours. Electrolyte during sessions >60 minutes of moderate-to-high intensity.
What about sports drinks — does martial-arts training need them at this age?
For sessions or matches over 60 minutes at moderate-to-high intensity, yes. Otherwise water + a balanced post-session meal is better than a sports drink with added sugar.
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