Workout Description

Why This Workout Is Medium

This workout features 7 all-out 15-second Echo Bike sprints with 2 minutes of complete rest between rounds. The work-to-rest ratio (1:8) is extremely favorable, allowing near-full recovery between efforts. While each sprint demands maximal anaerobic power, the generous recovery prevents significant fatigue accumulation. Total time commitment is ~21 minutes. The average CrossFitter can sustain high intensity across all rounds without scaling. The primary challenge is mental—maintaining sprint intensity when fresh—rather than physical exhaustion.

Training Focus

This workout develops the following fitness attributes:

• Power (9/10): 15-second all-out sprints are pure explosive efforts. Maximal power output is essential to generate peak wattage on the bike during each interval.
• Speed (9/10): Sprint intervals demand maximum cycling cadence and rapid acceleration. Quick transitions between rest and effort periods emphasize speed and explosive leg turnover.
• Endurance (8/10): Seven 15-second all-out sprints with 2-minute recovery intervals demand high cardiovascular capacity. The repeated maximal efforts stress aerobic and anaerobic systems significantly.
• Stamina (3/10): Each sprint is brief (15 seconds), limiting muscular endurance demands. The 2-minute rest allows substantial recovery between efforts, reducing sustained output requirements.
• Strength (1/10): Echo bike sprints require minimal force production. Movement is cyclical with moderate resistance, not maximal strength or heavy loading.
• Flexibility (1/10): Seated cycling position demands only basic hip and ankle mobility. No complex movement patterns or extreme ranges of motion required.

Movements

• Air Bike

Scaling Options

This workout is highly accessible and rarely needs significant modification since the duration is only 15 seconds. However, consider these adjustments: (1) Reduce rounds to 5 if you are newer to sprint intervals or have cardiovascular concerns. (2) Substitute the Echo Bike with an Assault Bike, ski erg, rower, or even a 50-75m all-out sprint if no bike is available — the key is maximal effort in 15 seconds. (3) Increase rest to 2:30-3 minutes if you are unable to reproduce similar output by round 4 or 5. (4) For athletes with lower body injuries, the ski erg is the best substitute as it removes leg drive and shifts to upper body and core power.

Scaling Explanation

Scale the rest period (not the effort) if your power output drops significantly after round 3 — this means your body isn't recovering fully in 2 minutes, which defeats the purpose of the session. Every athlete, regardless of fitness level, should be going all-out for 15 seconds — the intensity should never be scaled down. If you cannot sprint safely due to injury, substitute the movement rather than reducing effort. The goal is to finish all 7 rounds with consistent or near-consistent output. If you're a newer athlete unfamiliar with sprint intervals, start with 5 rounds to gauge your response before progressing to the full 7. Prioritize maximum power output over everything else — this workout lives and dies by your willingness to go truly all-out.

Intended Stimulus

Pure sprint power and neuromuscular output. This is a maximal effort interval workout — 7 rounds of 15-second all-out sprints with generous 2-minute rest periods. The goal is to train your phosphocreatine (ATP-PC) energy system, developing peak power output and the ability to reproduce that power across all 7 rounds. Each sprint should feel like you're leaving everything on the bike. The long rest-to-work ratio (8:1) is intentional — it allows near-full recovery so every round can be attacked at maximum intensity. This is NOT a conditioning grind; it's a speed and power development session.

Coach Insight

The strategy here is simple but brutally honest — if you're pacing, you're doing it wrong. Every single sprint must be a true 10/10 effort from the first pedal stroke. Jump on the bike already moving and hit peak RPMs within the first 3-5 seconds. Stay seated and drive through the hips, not just the legs — pull up on the handles and push the pedals simultaneously for full-body power transfer. Aim to hit your highest possible RPM or wattage and hold it for the full 15 seconds. Track your output each round (calories, watts, or RPMs) — if your numbers drop more than 10% by round 5-7, you either went out too hot or didn't rest long enough. Common mistakes: starting too slow and ramping up (you lose precious seconds), not using the full 2-minute rest (stand up, breathe, shake out the legs), and treating this like a conditioning piece instead of a true sprint. Use the rest time wisely — stay loose, control your breathing, and mentally reset for the next effort.

Modality Profile

Air Bike is a cyclical cardio movement, classified as Monostructural (M). It is a stationary bike used for aerobic conditioning and endurance work.