Cycling Training: Base, Intervals, Zones and Strength

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January, 6 a.m. The bike is clipped into a trainer in the garage, a fan is roaring, and the screen says 4 x 8 minutes at threshold. Outside it’s dark and icy. Inside, you’re building the legs that will carry you up the climbs in June. That’s cycling training: long, steady hours most of the time, a few hard efforts that really count, and strength work off the bike. Whether you’re a teenager on a high school mountain bike team, a masters racer, a gravel rider with a big event on the calendar, or someone who wants to keep up on the Saturday group ride, the same building blocks apply. Here they are in plain language.

General information for healthy riders. If you’re new to hard exercise, have a heart condition, or are coming back from injury, check with your doctor first. For an overview of the sport, see our cycling hub.

Base: the easy miles that build everything

Most of a cyclist’s riding should feel easy: you can talk in full sentences. A widely cited review of how top endurance athletes train, by sport scientist Stephen Seiler, found that they spend roughly 80% of their sessions at low intensity and about 20% hard, the “80/20” pattern. Long, easy rides build the aerobic engine, help the body burn fat as fuel, and let you ride more without getting worn down. The hard days then go better because you come to them fresh.

• Off-season (late fall, winter): mostly easy riding, indoors or out, plus a block of strength training.
• Build (late winter, spring): keep the long ride, add one or two interval sessions a week.
• Race or event season: race-specific efforts, enough rest to be fresh, and a lighter week before the big day.
• Every few weeks: an easier week to absorb the work. Many riders use three weeks building, one week lighter.

Training zones: power and heart rate

Zones put numbers on “easy” and “hard”. The most widely used power system comes from exercise physiologist Andrew Coggan and is published by TrainingPeaks. It’s built on your functional threshold power (FTP), roughly the highest power you can hold for about an hour. Most riders estimate FTP with a hard 20-minute test or a ramp test built into a training app, then let the app set the zones. Heart rate works too, as a percentage of your threshold heart rate.

Zone	Name	% of FTP	% of threshold heart rate	What it feels like
1	Active recovery	Under 55%	Under 68%	Very easy spin
2	Endurance	56–75%	69–83%	All-day pace, easy talking
3	Tempo	76–90%	84–94%	Steady, talking gets choppy
4	Lactate threshold	91–105%	95–105%	Hard, a few words at a time
5	VO2 max	106–120%	Over 106%	Very hard, 3–8 minute efforts
6	Anaerobic capacity	Over 121%	n/a	Short, all-out surges
7	Neuromuscular power	n/a	n/a	Sprints of a few seconds

Power or heart rate? Power responds the instant you push harder; heart rate takes a minute or more to catch up and drifts up with heat, fatigue and dehydration. That makes power better for short intervals and heart rate a useful check on how your body is coping. Plenty of riders train well with heart rate only. If you use it, a chest strap such as the Polar H10 reads the heart’s electrical signal and holds up better than wrist sensors when you’re out of the saddle. For power meters, bike computers and straps, see our cycling wearables page and the best heart rate monitors for athletes.

Intervals: the hard 20%

Intervals are where fitness gets sharpened. A 2026 network meta-analysis of extra training methods in already-trained athletes found that high-intensity interval training and sprint interval training were the most consistently supported ways to raise VO2 max. You don’t need many: one or two hard sessions a week is plenty for most riders.

• Threshold (zone 4): 2–4 efforts of 8–20 minutes with short recoveries. The bread and butter of time trialists, climbers and gravel riders.
• VO2 max (zone 5): 4–6 efforts of 3–5 minutes, with about as much easy spinning between. Hard, and worth it. More in our VO2 max training guide.
• Sprints and surges (zones 6–7): 10–30 second bursts for criterium racers, mountain bikers and anyone who wants to close a gap.
• Warm up first: 10–15 minutes of easy spinning with a few short pick-ups before any hard set.

These are common session formats, not a prescription. A coach can build them around your goals, and USA Cycling certifies coaches at three levels, from entry-level to advanced.

Indoor training

Indoor riding is no longer the punishment it used to be. A smart trainer controls the resistance and connects to apps like Zwift, so structured intervals happen automatically and you can ride with friends on screen. It’s also the safest place for hard efforts: no traffic, no stop signs, no ice. The Wahoo KICKR CORE 2 is a popular direct-drive model: reviewers list ±2% power accuracy, up to 1,800 watts and 16% simulated climbs, at a launch price of about $550.

• Cool it down. Without wind, you heat up fast. A big fan in front of you makes a huge difference to comfort.
• Drink more than you think. Indoor sweat rates are high; keep a bottle within reach, and a towel for the bike.
• Move around. You shift position less indoors, which can make saddle and hand pressure worse. Stand up for a few pedal strokes every few minutes.
• Keep it shorter. Many riders find 60–90 focused minutes indoors does the job of a longer outdoor ride with stops.

Strength training for cyclists

Riders used to skip the gym to save their legs. The research says lift. A 2026 meta-analysis of 17 studies (262 cyclists) found that heavy strength training (loads of at least 80% of your one-rep max) improved cycling efficiency, anaerobic power and overall cycling performance compared with riding alone, without hurting aerobic fitness; the authors note the quality of the evidence is still low. There’s a second reason: cycling is low-impact, and a 2025 review notes that cyclists and swimmers are at higher risk of low bone density. It found early, limited evidence that resistance training and jumping exercises help.

The CDC, following the US Physical Activity Guidelines, recommends at least 2 days a week of muscle-strengthening activity for all major muscle groups for adults. For cyclists, that usually means:

• Legs and hips: squats, deadlifts or hip hinges, step-ups, lunges, single-leg work.
• Core and back: planks, side planks, bird dogs, back extensions, to support the bent-over position (low back pain is the most common overuse problem in pro cyclists; see cycling injuries).
• Upper body: rows, push-ups and pulling work for bike handling and crash resilience.
• Some impact: jumps or skipping for bone loading, if your joints and your doctor allow it.
• Timing: heaviest in the off-season (2–3 sessions a week), then 1–2 maintenance sessions in season, away from key rides.

Learn the lifts with light weights and good coaching before going heavy. A set of loop bands like the Fit Simplify loop bands covers hip and glute activation at home or before a ride; our best resistance bands for athletes guide has more.

Young riders and older riders

Kids and teens should ride for fun and skills first: bike handling, braking, cornering and group riding. Structured intervals can come later. The American Academy of Pediatrics recommends at least 1–2 days off a week from a young athlete’s main sport, and time off during the year. Masters riders (35+, and plenty in their 60s and 70s) can keep improving, but usually need more recovery between hard days and benefit even more from strength and bone-loading work.

The mental side

Long efforts are as much a head game as a leg game. Break hard intervals into small chunks, focus on smooth pedaling and breathing, and practice the race in your head: the climb, the move, the sprint. Group rides teach pack skills and confidence that no trainer can. Our mental training tools guide covers apps and tools athletes use. When the training is done, the real gains come during rest: see cycling recovery, and for race-day fueling, race day.

Cycling training: FAQs

What is zone 2 training in cycling?

Zone 2 is the “endurance” zone: about 56–75% of your FTP, or 69–83% of your threshold heart rate, in Coggan’s system. It feels easy enough to talk in full sentences. Most of a well-built training week is spent here.

What is FTP?

Functional threshold power is roughly the highest average power you can sustain for about an hour. It anchors your power zones. Most riders estimate it with a hard 20-minute test or an app’s ramp test and many retest after each training block, since FTP changes as fitness does.

Should cyclists lift weights?

Yes, for most riders. A 2026 meta-analysis found heavy strength training improved cycling efficiency and performance, and lifting and impact work also help protect bone, which cycling alone does little for. Start light, learn good form, and lift hardest in the off-season.

How many hard workouts a week should I do?

For most riders, one or two. Research on elite endurance athletes shows about 80% of sessions are easy and 20% hard. More hard days usually means more fatigue, not more fitness.

Is indoor training as good as riding outside?

For fitness, a structured indoor ride can be just as effective, and it’s safer for intervals. Outdoor riding still matters for bike handling, group skills, descending and cornering, so mix both when you can.