Cardio Combat is a standing cardio and combat conditioning workout built entirely from high knees and punches - two movements that together cover the full body without a single transition to the floor. High knees drive the cardiovascular demand and train hip flexor power and running mechanics; overhead punches and standard punches develop shoulder endurance, core rotation, and the reflexive trunk bracing that striking movements depend on. The sequence alternates between the two across nine blocks per set, cycling through three rounds of high knees, overhead punches, high knees, standard punches before closing with three more high knees and a final overhead punch block. Across 3, 5, or 7 sets with up to 2 minutes of rest, the volume accumulates fast.

The rep counts are high by design - 20 reps per block means each appearance of an exercise is a sustained effort rather than a brief stimulus. Twenty high knees require the hip flexors, calves, and cardiovascular system to work continuously. Twenty overhead punches with the arms driving above head height load the deltoids and upper trapezius through a range that most training ignores, while the alternating arm pattern means the core is constantly resisting rotation. Twenty standard punches shift the load to the horizontal plane, engaging the chest, anterior deltoid, and the rotational muscles of the trunk with each cross.

Keep the knees genuinely high - above hip height if possible, not a casual jog-in-place. On overhead punches, extend fully at the top rather than stopping short, and let the shoulder blade protract with the punch rather than holding the scapula locked. On standard punches, rotate through the torso with each cross rather than pushing from the shoulder alone. The punch is a full-body movement done correctly.

Seven sets of this is not a small thing.

To make it easier: Reduce the high knees to a march, lifting the knees to a comfortable height rather than driving them overhead. Lower the punch count to 10 per block and take the full 2 minutes of rest between sets.

To make it harder: Sprint the high knees at maximum speed for all 20 reps, and perform the punches with deliberate rotational power - pivoting the rear foot and driving from the hip with each cross. Cut rest to 60 seconds between sets.