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True sprint interval training (SIT)

Sprint Intervals: Peak

Ten all-out sprints with extended recovery — the strongest stimulus for VO2 max, mitochondrial density and bone-protective hormones. Bodyweight default, machine swap noted.

40 minAdvancedNo equipment
60

Warm-up

  • Marching in Place with Arm Circles

    240 seconds

    Stand tall and proud, feet hip-width apart, arms relaxed at your sides; as you gently lift one knee, just a few inches, like marching in slow motion, let your arms trace graceful circles forward and back, breathing smoothly and deeply—in through your nose as you lift, out through your mouth as you lower. Focus on keeping your core gently engaged, feeling stable and strong as you move. A common mistake is rushing the steps or letting your shoulders hunch; remember, it's about control and fluidity, not speed. You've got this!

    Illustration of Marching in Place with Arm Circles
  • Dynamic Leg Swings Front to Back

    180 seconds

    Stand tall with a gentle core embrace, softly gazing forward. Now, with a little twinkle in your step, let your leg gently swing forward and back like a pendulum, exhaling softly as it reaches its highest point in front, then inhaling as it swings back. Remember to keep your standing leg slightly soft, like a spring. A common thing we sometimes do is let our body lean too much, instead of letting the leg do the work. You've got this beautiful movement.

    Illustration of Dynamic Leg Swings Front to Back

Main session

Sprint Intervals

10 rounds
  • Jump Squats Optional Low-Impact Alternative Fast Air Squats

    30 seconds

    Alright, stand with your feet about hip to shoulder-width apart, toes pointing slightly out. Now, quickly squat down like you're aiming for a chair, letting your hips hinge back and down, then powerfully drive back up to standing. Breathe out as you stand tall. Remember to keep your chest lifted and your core gently engaged throughout. A common "oops" is letting those knees cave inwards, let's keep them tracking over your toes. You've got this!

    Illustration of Jump Squats Optional Low-Impact Alternative Fast Air Squats
  • Gentle Walk

    120 seconds

    Find a comfortable upright posture with your shoulders dropped away from your ears and your gaze forward. Step forward lightly, letting your arms swing naturally at your sides as your weight shifts from heel to toe. Keep your stride easy and fluid rather than rushed. Exhale softly as you push off each foot, keeping your breath steady to avoid any pressure in your lower abdomen. Avoid locking your knees or tensing your neck as you move. You should feel a sense of lightness and gentle warmth throughout your body.

    Illustration of Gentle Walk

Cool-down

  • Marching in Place Slow

    180 seconds

    As you begin your marching, stand tall with a soft bend in your knees, gently engaging your core. Now, slowly and mindfully lift one knee, then the other, taking just two to four thoughtful steps, inhaling as you lift a knee and exhaling softly as you lower it. Focus on keeping your shoulders relaxed and down, avoiding any shrugging toward your ears. Remember, the goal is a controlled, deliberate lift and lower, not a race.

    Illustration of Marching in Place Slow
  • Hamstring Stretch Standing or Seated

    120 seconds

    Okay, let's gently stretch those hamstrings. Begin by either sitting tall with your legs extended in front of you, or standing with one heel propped slightly in front of the other, knee relaxed. As you exhale slowly, lean forward from your hips, keeping your back long and straight as if someone is pulling a string from your chest, feeling a gentle pull along the back of your leg. Remember to inhale as you return to the starting position. A common mistake is rounding your back, which can strain it and doesn't effectively stretch the hamstring, so focus on that flat back.

    Illustration of Hamstring Stretch Standing or Seated

Tags

cardiosprintsitintervalsadvanced