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(Odd numbers engage your mind more than even ones, so you focus less on fatigue.)

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Cycle through the moves for 7 minutes, then take a 1-minute break.

Squat until thighs are parallel to floor (as shown).

Stand as you extend arms to press weights overhead.

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Return to start; repeat.

Do 7 reps.

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Grip handles; turn them to unlock platform.

Bend knees to 90 degrees (as shown), then press back to start.

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Jump feet toward hands (as shown), then jump feet back to start; repeat.

Do 7 reps.

Minutes 8 to 15

After your 1-minute breather, immediately start your second circuit.

Cycle through the moves for 7 minutes, then take a 1-minute break.

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Pull handles toward body, squeezing shoulder blades together (as shown).

Extend arms back to start.

Bend knees and crunch up until abs engage (as shown).

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Hold for 1 beat, then return to start; repeat.

Move fast to do as many rounds as possible.

Grasp handles and, with arms straight, place knees on platform.

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Press up to return to start; repeat.

Do a push-up, then pull left knee toward left elbow (as shown).

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