5 rounds, each for time, of:
800/1,000-meter standing bike

Rest 2 minutes between rounds.

 

Stimulus and Strategy:
Today’s intervals are all-out sprints on the bike with a spicy twist — you will stand as you pedal. Use any stationary bike you have available. Each round should be a maximal effort. This means each set should occupy every ounce of your capacity, both mental and physical. As long as you are pushing these physical and psychological tolerances, you are hitting this workout as intended. Following each set, rest for 2 minutes before the next attempt.