Workout Description

Why This Workout Is Medium

This workout features moderate aerobic demand with built-in recovery. The 1:00 rest between rounds (roughly equal to work time) allows substantial cardiovascular recovery, preventing cumulative fatigue. While calorie targets increase progressively (20→24→30), the assault bike is a low-skill movement with forgiving mechanics. The primary challenge is pacing strategy and aerobic capacity, not technical skill or extreme volume. Average CrossFitters can complete as prescribed with manageable effort.

Benchmark Times for Diesel Legs

• Elite: <8:35
• Advanced: 9:05-9:40
• Intermediate: 10:20-11:05
• Beginner: >15:45

Training Focus

This workout develops the following fitness attributes:

• Endurance (8/10): Five rounds of sustained high-intensity bike work demands significant cardiovascular capacity. The 1:00 rest between rounds is insufficient for full recovery, requiring aerobic system to handle repeated efforts.
• Stamina (7/10): Escalating calorie targets (20→24→30) test the ability to maintain muscular output despite fatigue. Legs must sustain power production across five consecutive efforts with minimal recovery.
• Speed (7/10): Strict time caps (1:30 per round) and escalating calorie demands require fast, consistent cycling pace. Minimizing time per calorie is critical for meeting targets and managing fatigue.
• Power (6/10): Each round requires explosive leg drive to accumulate calories quickly within the 1:30 target window. Power output directly correlates with calorie completion speed and overall performance.
• Strength (1/10): Assault bike requires minimal force production compared to loaded movements. Power comes from muscular endurance rather than maximal strength, making this domain nearly irrelevant.
• Flexibility (1/10): Seated bike position demands only basic hip and ankle mobility. No complex movement patterns or extreme ranges of motion required for this workout.

Movements

• Air Bike

Scaling Options

For athletes who struggle to hit the calorie targets under 1:30: reduce to 15/12 calories per round with the same ascending format (15/12, 15/12, 18/15, 18/15, 22/18). Alternatively, substitute a 200m Row or 30 second Echo Bike sprint if an Assault Bike is unavailable or uncomfortable. Athletes with hip or knee limitations can sub 250m/200m Row for each round, adjusting distance to match the ~1:00-1:30 time domain. If five rounds feels like too much volume, reduce to 3 rounds keeping the ascending calorie structure (20/16, 24/20, 30/24) to preserve the intent of finishing strong under fatigue.

Scaling Explanation

Scale if you cannot complete round 1 within 1:30 at full effort — the calorie targets are the stimulus, not the time cap. If you finish round 1 in 1:45 or more, drop calorie targets by 20-25% to keep intensity high and preserve the sprint nature of the workout. Athletes who are newer to the Assault Bike should prioritize learning to drive with high RPM and full leg engagement over hitting Rx numbers — proper movement and sustained intensity matter more than the exact calorie count. The goal is to finish every single round feeling like you left everything on the bike. If you're cruising through rounds 1 and 2, you're not working hard enough — intensity over volume every time.

Intended Stimulus

This is a sprint-based interval workout designed to develop peak power output and anaerobic capacity on the bike. Each round should feel like an all-out effort — short burst power with a hard, uncomfortable push from start to finish. The ascending calorie scheme forces you to dig deeper as fatigue accumulates, making this as much a mental challenge as a physical one. The 1:00 rest is intentionally short — just enough to partially recover, but not enough to feel fresh. Expect your lungs and legs to scream. The primary adaptation is maximal sprint output under accumulating fatigue.

Coach Insight

Attack every round like it's a standalone sprint — do not pace conservatively in rounds 1 and 2 just because the calories climb later. Get on the bike and drive hard from the first stroke. Sit tall with a strong core and drive through the pedals using your full leg, not just your quads — think 'push and pull' through the entire stroke. Keep your RPM high rather than grinding a heavy resistance; a fast, fluid cadence will be more sustainable and faster for most athletes. For rounds 3 and 4 (24/20 cal), accept that it will hurt more and hold your form — resist the urge to slump forward and drop your hips. Round 5 is your race — leave nothing behind. Common mistake: starting round 1 too conservatively and never actually hitting true sprint intensity. Another common error is tensing the upper body — keep your grip relaxed and let the legs do the work. If you're not finishing rounds in under 1:30, your pacing or power output needs adjustment before the next attempt.

Benchmark Notes

The primary limiter is assault bike output and anaerobic capacity under escalating calorie demands. L5 (~690 sec, 11:30) represents hitting the 1:30/round target consistently across all 5 rounds including the heavier rounds 3-5, with 4 minutes of rest baked into total time.

Modality Profile

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