Alternating extension and flexion of one leg in push-up position ► barbell knee blast / mountain climber

Lieback position, resting your arms on a barbell (possibly with weight plates) at about shoulder width (high support, face/look down), alternately bend one leg and lift it slightly off the floor (bring your knees between your arms/to your chest).

Attention:
Keep your upper body as stable as possible (entire body forms a line from the shoulders to the feet), no hollow back (tighten your stomach).

Lighten:
Just hold the basic position (push-up position); barely lift your leg off the floor and/or move it less forwards; perform the exercise without a barbell.

Harden:
Add weight to the legs.

Variant:
Move your knee diagonally (crosswise) to the opposite arm.

1 barbell

2 weight cuffs ► Make the exercise more difficult (additional weight)