Exercise
Bicycle Crunch — one of the most effective abdominal exercises, combining a crunch and a pedaling leg movement. Scientific research (EMG) shows that the bicycle crunch activates both the rectus abdominis and the obliques more than most other abdominal exercises. It is an excellent choice for effectively training the entire abdominal core.
🎯 Primary Muscles
Rectus abdominis, internal and external obliques.
🔧 Secondary Muscles
Hip flexors, quadriceps (minimally).
⚡ Exercise Type
Combined — crunch + rotation + leg work.
📊 Difficulty Level
Intermediate. Requires coordination between the upper and lower body.
📋 Technique
1
Starting Position: Lie on your back with your hands behind your head (lightly, without pulling). Legs are raised, knees bent 90°.
2
Starting Movement: Lift your shoulders off the floor by contracting your abdominal muscles. One leg straightens, the other remains bent.
3
Twist + Leg: Twist your torso toward the bent leg, trying to touch the knee with the opposite elbow. At the same time, the other leg straightens.
4
Switch: Smoothly switch sides — straighten the bent leg and bend the extended one, twisting your torso to the other side.
5
Rhythm: The movement should be smooth and rhythmic — like pedaling a bicycle. Your feet should not touch the floor.
6
Breathing: Exhale during the twist, inhale when switching sides. 15-20 repetitions per side.
💪 Muscles
| Muscle Group | Muscle | Role |
|---|---|---|
| Abs (Center) | Rectus Abdominis | Primary — Torso Flexion |
| Abs (Sides) | External and Internal Obliques | Torso Rotation |
| Hips | Hip Flexors (Iliopsoas) | Leg Raise and Pedaling |
| Thighs | Rectus femoris | Leg Extension During Pedaling |
⚠️ Mistakes
- Head Pulling: The hands pull the head — the neck tenses. The hands only support.
- Too Fast Tempo: Momentum is used. Control the movement.
- Elbow Does Not Reach the Knee: Rotation is too small. Twist until you feel the obliques working.
- Legs Too Low: It places too much load on the lower back. The legs should be high enough.
- Breath Holding: Rhythmic breathing is essential.
🔄 Variations
| Variation | Description | Difficulty |
|---|---|---|
| Slow Tempo | Slow, controlled — more strength work. | Lightweight |
| Fast Tempo | Fast, cardio-style — more calorie burning. | Intermediate |
| Hold at the Top | Pause when the elbow touches the knee (1-2 sec.). | Intermediate |