Cardio Crank + Lower Body Circuit
Equipment needed: Treadmill or elliptical, one medium-weight dumbbell (optional lighter weight for modifications)
Overview: This circuit alternates short, intense cardio intervals with focused lower-body and core movements to build strength, endurance, and metabolic conditioning. Complete the full sequence 2–3 times based on your current fitness level. Perform a 2-minute sprint on the treadmill or elliptical before each strength move to keep your heart rate elevated and maximize calorie burn.
How to structure the circuit
Start with a 2-minute sprint on the treadmill or elliptical at a challenging but sustainable intensity. After the sprint, perform the following strength move for the prescribed reps with controlled form. Repeat the pattern—cardio sprint, strength exercise—through all listed exercises. Rest 60–90 seconds between full rounds if needed. Scale the speed, incline, resistance, and dumbbell weight to match your abilities and goals.
Alternating Forward Lunges — 20 total
Stand with feet hip-width apart. Step forward with the left leg and lower into a 90/90 lunge, keeping your chest lifted, shoulders back, and the front knee stacked over the ankle. Push through the front heel to return to standing and reset to hip-width stance. Alternate legs for a total of 20 repetitions (10 per side). To progress, hold light or medium dumbbells at your sides. To modify, reduce range of motion or perform stationary split squats.
In-and-Out Squats — 20 reps
Begin standing with feet together. Jump your feet out to land in a squat with weight in the heels and chest lifted; then jump back to the starting position with feet together. Maintain soft knees on landing and an upright torso. If impact is not suitable, perform regular bodyweight squats without the jump. For added challenge, hold a light dumbbell at chest height or a single dumbbell with both hands.
Lateral Lunges — 20 total
Stand with feet hip-width apart. Step your right leg out to the side and sit back, keeping the left leg straight and acting as an anchor. Place the majority of your weight in the right heel and drive the hips back so the right knee tracks over the ankle. Keep your chest lifted. Push back to center and alternate sides for 20 total reps (10 per leg). Hold light or medium dumbbells to increase resistance, or reduce step distance to make the movement easier.
Dumbbell Ab Extensions — 20 reps
Lie on your back holding a medium-weight dumbbell with both hands. Lift your shoulders slightly off the ground and extend your legs straight, hovering them a few inches above the floor. On the inhale, lower your legs slightly while keeping the dumbbell extended overhead; on the exhale, draw your knees into your chest and bring the dumbbell toward your shins. Maintain core tension throughout to protect the lower back.
Alternating Pointers (Tabletop Reach) — 20 total
Start in a tabletop position with a neutral spine, hands under shoulders and knees under hips. On the inhale, extend your right arm forward to shoulder height and reach your left leg back to hip height, keeping both limbs long and aligned. On the exhale, return to tabletop. Alternate sides for 20 repetitions total (10 each side). Focus on controlled movement and core stability rather than speed.
Progressions and modifications
To make the workout harder: increase treadmill/elliptical resistance or incline, raise sprint speed, add weight to the strength moves, or perform an additional circuit round. To make it easier: shorten cardio intervals to 90 seconds, reduce dumbbell weight, lower rep counts, remove jumps, and allow longer rest between rounds. Always prioritize form over intensity.
Coaching cues and breathing
Maintain an upright chest on lower-body movements, keep the knee tracking over the toes, and push through the heels for lunges and squats. For core exercises, exhale on the effort (when bringing knees in or extending limbs) and inhale on the return. Keep shoulders relaxed and neck neutral during floor work.
Estimated session structure
Warm up for 5–10 minutes with dynamic movement (light cardio, leg swings, hip circles). Perform the circuit 2–3 times, with each round taking roughly 18–25 minutes depending on rest and transition time. Finish with a brief cooldown and mobility work focusing on hips, hamstrings, quads, and calves.
Disclaimer: Consult your physician before beginning any new exercise program. The creators consulted professional trainers for the Summer SWEAT Series, but you participate at your own risk. Modify exercises as needed and listen to your body to avoid injury.