For twenty minutes:
7 Jump rope “double-unders”
Scored by number of reps completed in 20 minutes.
Try an unsupported bench press. Dave Leys fully extended from the glute-ham developer can “really feel” the difficulty of this lift with even an empty bar. The United States All-Round Weight Lifting Association or USAWA is the authority for “odd-lifts.”
Some of these lifts place enormous demands on stabilizing muscles; others are very functional. Some are as demanding of cardiorespiratory function as running, while others train for teamwork or coordination. The USAWA site features lifts and rules.