Why fitness matters for MTB
Three reasons:
- You ride better when not gassed. Decision-making at lap 4 of a bike-park day is what separates the riders going home in one piece from the ones in A&E. Cardio buys you decision-making capacity.
- You crash less when stronger. Holding the bars through a long rough section, absorbing repeated landings, recovering when the bike skips off-line — all strength.
- You recover faster. A trained body bounces back from a hard ride within a day; an untrained body lingers in soreness for three.
For a 13-year-old rider — fun first, no overtraining
This section is the most important: do not train a 13-year-old like a 30-year-old amateur. The biggest mistakes parents and coaches make are over-structuring and over-loading at an age where the body is still building. Long-term, this kills riders out of the sport.
The principle: play, don't program
At 13, the priority is movement variety, motor pattern development, and keeping the sport fun. A kid who loves it at 13 still rides at 20. A kid who's force-marched through "structured training" at 13 quits at 17.
What good off-bike work looks like for a 13-year-old
- Other sports. Gaelic football, rugby, soccer, swimming, skateboarding, climbing — anything that adds different movement patterns. Cross-training is the single biggest predictor of long athletic careers.
- Bodyweight strength. Push-ups, pull-ups, planks, jumping rope, single-leg balance, hopping games. 15 minutes a few times a week. No weights yet.
- Mobility / yoga. 10 minutes after a ride. Hip flexors, hamstrings, thoracic spine. Most kids who ride a lot get tight hips fast.
- Pump track / dirt jump sessions. Counts as cardio AND skill work. Probably the single highest-value off-trail thing a kid can do for MTB.
- Long ride one day a week. 2–3 hours, easy pace, social with friends.
- Sleep. 9–10 hours. Non-negotiable for growth and recovery.
What to avoid at 13
- Structured interval training prescribed in watts or heart-rate zones — too rigid for a developing body, kills the love.
- Heavy barbell work — not because it's dangerous (properly coached, it isn't) but because bodyweight gets 90% of the result with zero coaching risk.
- Riding 6 days a week. Two days off the bike is fine. Different sport on those days is better.
- Diet talk. A growing teen eats. End of.
- Crash-after-crash days. If a kid is tired and crashing more than usual, the ride is over.
For an adult amateur — what to actually train
Cardio: zone 2, then everything else
The backbone of cycling fitness is "zone 2" — easy aerobic riding where you can hold a conversation. 60–80% of weekly cardio should be here. It builds the mitochondria that let you ride hard later without blowing up.
If you have an hour to train per week off the bike, make it zone 2 — a steady run, a long walk on hills, an easy spin on a turbo. Save the suffering for the trail.
Intervals — yes, but not every ride
One interval session per week is plenty for most amateurs. The classic MTB-friendly options:
- 4 × 4 minutes at "hard but sustainable" pace, 4 minutes easy between. Builds top-end aerobic.
- 30/30s — 30 seconds hard, 30 easy, 10 rounds. Mimics MTB's stop-start effort.
- 10-minute climbing repeats at threshold. The closest thing to "race pace" most of us will do.
Strength — the part most riders skip
Twice a week, 30–45 minutes. The five movements that cover 90% of MTB needs:
- Squat (goblet, back, or single-leg) — for descending posture.
- Hinge (deadlift, RDL, hip thrust) — for absorbing landings and saving the lower back.
- Push (push-up, bench, overhead press) — for bracing.
- Pull (row, pull-up, lat pulldown) — for grip and bar control.
- Carry / loaded carry (farmer's walk, suitcase carry) — for grip + core in one.
2–4 sets of 5–10 reps. Don't chase 1RMs. You want strength endurance, not powerlifting numbers.
Mobility and balance
- 10 minutes of hip and thoracic mobility after every ride.
- 2 × 10 minutes a week of balance work — single-leg stands, Bulgarian split squats, slackline if you have one.
A realistic week for a working adult amateur
- Mon: rest or 30 min easy walk.
- Tue: 45 min strength session.
- Wed: 60 min zone-2 turbo or run.
- Thu: 30/30 intervals on bike or run (45 min total).
- Fri: 30 min strength + mobility.
- Sat: Long MTB ride — 2–4 hours, mostly fun, some climbing.
- Sun: Easy social ride or rest.
Recovery — non-negotiable
Sleep 7–9 hours. Protein at 1.4–1.8 g per kg of bodyweight. Don't train hard two days in a row when you're over 35 — alternate. A poorly recovered amateur trains worse than a well-recovered one who trains less.