Depending on wind resistance and terrain, maintaining this speed usually requires a power output between 200 and 250 watts for an average-sized rider.
While 21 mph is a fast cycling pace, it is an for human runners. Human Limits: The average human sprints at about 15 mph.
"Key work" at this pace improves the body's ability to utilize oxygen and burn fat efficiently before switching entirely to anaerobic systems. 21 MPH in the Context of Elite Athletics 21 mph keju work
Heavy lifting (like the 100kg bench press reps seen in elite NFL prospects) builds the raw power needed for explosive acceleration.
"21 mph keju work" is likely a misspelling or niche shorthand for , specifically referring to high-intensity threshold training in cycling or elite athletic performance. The Mechanics of 21 MPH "Key Work" Depending on wind resistance and terrain, maintaining this
Sustaining 21 mph requires a high level of cardiovascular fitness. For most, this isn't a "leisurely stroll" but a focused effort that builds the engine required for racing or long-distance endurance.
Whether you are a cyclist aiming for a new personal best or an athlete training for professional scouting, 21 mph represents a bridge between "average" and "elite" performance. 21mph to kmh - Symbolab 21 miles Per Hour is approximately 34 kilometers Per Hour. "Key work" at this pace improves the body's
Alternating between bursts of maximum effort (22+ mph) and recovery periods to raise the overall threshold.
In the NFL Draft and high-level scouting, "game speed" is often tracked. Players reaching 21–23 mph during a play are considered "freak athletes" with top-end speed that translates directly to professional success. Training Strategies for High-Speed "Work"