The 4 fundamental exercises for runners
Squats, lunges, hip thrusts, and calf work are the winning combination. Integrated 2 times per week, they build strong legs, an efficient stride, and help prevent injuries.
Why these exercises are essential for runners
Lower-body strengthening exercises are not chosen at random. Each one targets specific muscles and movement patterns that directly improve your running performance.
🎯 Double goal: endurance AND power
In running, you need to develop both:
- • Strength endurance: the ability to repeat contractions (long sets, 12-15 repetitions)
- • Muscular power: the ability to produce force quickly, essential for propulsion and running economy. Science shows that power improves neuromuscular coordination and reduces ground contact time.
That is why you need to integrate both traditional exercises (squats, lunges) AND their explosive/plyometric variations to maximize your gains.
1. The squat: the king of leg strengthening
Target muscles
- Quadriceps (front of the thigh)
- Glutes (gluteus maximus)
- Hamstrings (back of the thigh)
- Low back and abdominals (stabilization)
Why it matters
The squat develops global leg strength and teaches the right hip-knee flexion-extension pattern, essential for push-off in running.
Runner-specific variations
Single-leg squat
Why: Running is a succession of single-leg supports. The single-leg squat corrects left/right imbalances and improves stability.
Tip: Start with an assisted "Pistol Squat" (holding onto a support) or a "Step Down" from a step.
Goblet squat (with kettlebell or dumbbell)
Why: Holding the weight in front of the body encourages an upright posture and engages the abdominals more, improving trunk stability.
⚡ Explosive variation: Squat Jump
Why: Develops muscular power and neuromuscular coordination. The squat jump improves your ability to produce force quickly, an essential quality in running.
Execution: Same position as the classic squat, but with an explosive upward phase into a jump. Land softly on the forefoot then heels. Use short sets (6-10 reps) to maximize power.
Correct execution
- Feet shoulder-width apart, toes slightly turned out
- Descend by pushing the hips back (as if sitting down)
- Keep the back straight, chest open, eyes forward
- Descend until the thighs are parallel to the ground (or lower if mobility allows)
- Push through the heels to stand up, squeeze the glutes at the top
⚠️ Common Mistake
Do not let your knees collapse inward (knee valgus). Actively push the knees outward to protect your joints.
2. Lunges: the most running-specific exercise
Target muscles
- Quadriceps (front leg)
- Glutes and hamstrings (front and rear leg)
- Ankle and knee stabilizers
- Abdominals and low back (balance)
Why it matters
The lunge reproduces the hip extension position of running, with closed-chain work (foot on the ground). It is the exercise closest to the technical gesture of the stride.
Runner-specific variations
Walking lunges
Alternate left and right leg while moving forward. Ideal for strength endurance (long sets).
Reverse lunges
Easier on the knees, excellent for runners with anterior knee pain.
⚡ Jump lunges - Plyometric variation
Why it is essential: Develops explosiveness and plyometric qualities. Jump lunges improve neuromuscular coordination and the ability to generate force quickly. This variation increases difficulty without heavy equipment.
Execution: Start in a lunge position, then jump vertically and switch legs in the air. Land controlled in the opposite lunge. Reserved for experienced runners who have already mastered the classic lunge.
Correct execution
- Start standing, feet hip-width apart
- Step one leg forward (or backward depending on variation)
- Lower vertically until the rear knee nearly touches the ground
- The front knee should not pass beyond the toes
- Push through the front heel to rise
- Keep the torso upright, abs engaged
3. Hip thrust: the secret exercise of high-performing runners
Target muscles
- Gluteus maximus (the body's most powerful muscle)
- Hamstrings
- Low back and spinal erectors
Why it is more running-specific than the squat
The Hip Thrust horizontalizes the push, which better matches forward propulsion in running. While the squat mainly trains vertical push, the Hip Thrust specifically strengthens hip extension, the main engine of the stride. This biomechanical specificity makes it especially effective for improving propulsion and running economy.
💡 Did you know?
Studies show that the Hip Thrust activates the gluteus maximus more than the classic squat. Strong glutes = better propulsion, less stress on the knees, and a more efficient stride.
Correct execution
- Sit on the floor, back against a stable bench (or step)
- Place a barbell (or weight) on the hips
- Feet flat, shoulder-width apart, knees bent at 90°
- Push through the heels to lift the hips
- Rise until shoulders-hips-knees are aligned
- Squeeze the glutes strongly at the top
- Lower under control without fully resting the glutes on the floor
Variations
- Single-leg Hip Thrust: One leg extended in front, to correct asymmetries
- Glute Bridge: Floor version, without a bench, ideal for beginners
- Pause Hip Thrust: Hold the top position for 3-5 seconds to maximize contraction
4. Calves: the forgotten part of strength training
Target muscles
- Gastrocnemius (superficial calf)
- Soleus (deep calf)
- Achilles tendon
Why it is crucial for runners
The calves absorb 2 to 3 times body weight at every stride. They store and return elastic energy ("spring" effect). A strong Achilles tendon = lower tendinopathy risk and better propulsion.
🔬 What the science says
Eccentric exercises (controlled lowering phase over 3 counts) and plyometrics (jumps, jump rope) are essential for increasing tendon stiffness by up to 16%, making tendons more robust and more efficient. This adaptation reduces the risk of Achilles tendinopathies and shin splints, two common running injuries.
Key exercises
Calf raises
Stand on the balls of the feet, rise and lower. Variations: straight legs (gastrocnemius) or bent knees (soleus).
Tip: Use long sets (15-20 repetitions) for strength endurance.
Drop down (Achilles tendon prevention)
Standing on a step, lower one heel below step level over 3 counts (slow eccentric phase), then rise back up. Excellent for strengthening the Achilles tendon eccentrically and increasing its stiffness.
⚡ Plyometric variations for calves
- Jump rope: Excellent plyometric calf work, improves coordination and the Achilles tendon's ability to store/return energy. Sets from 30 seconds to 2 minutes.
- Forward/backward/lateral jumps: Develop calf power and ankle stability. Essential for trail runners (unstable terrain).
How to integrate these exercises into your week
Sample program (2 sessions/week)
Session 1: thighs and glutes focus
- • Squat (or Goblet Squat): 3 sets of 12-15 reps
- • Hip Thrust: 3 sets of 12-15 reps
- • Forward Lunges: 3 sets of 10 reps per leg
- • Calf Raises: 3 sets of 15-20 reps
Session 2: stability and unilateral focus
- • Single-leg Squat (assisted): 3 sets of 8-10 reps per leg
- • Reverse Lunges: 3 sets of 10 reps per leg
- • Single-leg Hip Thrust: 3 sets of 10 reps per leg
- • Calf Drop Down: 3 sets of 12 reps per leg
Progression and safety
- Start light: Master bodyweight technique before adding load
- Progress gradually: Add 5-10% load or 2-3 repetitions per week
- Listen to your body: If there is pain (not soreness), stop and consult
- Prioritize quality: 10 perfect reps are worth more than 20 sloppy ones
Simple RenfoRun-style version
Turn the GPP exercise list into two very simple sessions.
- GPP 1 — 3 rounds for time: air squat, reverse lunge, glute bridge. Move smoothly, not frantically.
- GPP 2 — AMRAP (as many rounds as possible) for 8 min: split squat, single-leg balance, side plank. Add a calf accessory block if needed.
You understand the method. RenfoRun gives you the workout.
No planning, no hesitation — just open the app and follow the session.
- ✓ Guided workouts with timer — just follow along
- ✓ Automatic progressions: your sessions evolve every week
- ✓ 12 to 25-minute sessions, designed to fit your running schedule
- ✓ Built exclusively for runners — road or trail
Conclusion
Squats, Lunges, and Hip Thrusts form the winning trio of leg strengthening for runners. By integrating them 2 times per week into your routine, you will build strong legs, a more efficient stride, and prevent injuries.
Do not forget: consistency is the key. Start today! 🏃💪