Mountain climbers combine cardio and strength, targeting the core, legs, and arms. Start in a plank, alternate driving knees towards the chest. Fast-paced, boosts metabolism.

The plank is a core-strengthening exercise. Assume a push-up position, elbows under shoulders, resting on forearms. Keep body straight, hold. Enhances core stability and strength.

The barbell squat targets quads, hamstrings, and glutes. Place a barbell on your upper back, squat deep with your hips back, and stand up straight. Builds lower body strength and stability.

Knee push-ups are a modified, less intense version of the classic push-up, making them accessible for beginners or those with physical limitations.