Exercise guide · Intermediate · Compound

Lying Leg Raise Flat Bench: How to Do It & Muscles Worked

The lying leg raise flat bench is an abdominal exercise performed on a flat bench using only body weight. It primarily targets the abs and also engages the hip flexors. The movement involves lifting straight legs up towards the ceiling while lying flat, then lowering them back down under control.

Primary muscles
Abs
Secondary muscles
Quads
Equipment
Body Weight
Level · type
Intermediate · Compound
Demonstration of the lying leg raise flat bench
Front view: muscles worked by the lying leg raise flat bench. Primary: abs. Secondary: quads.
Back view: muscles worked by the lying leg raise flat bench. Primary: abs. Secondary: quads.
Primary Secondary

How to do the lying leg raise flat bench

  1. Step 1: Lie flat on a flat bench with your back pressed against it.
  2. Step 2: Place your hands under your glutes for support.
  3. Step 3: Keep your legs straight and together, and lift them up towards the ceiling.
  4. Step 4: Pause for a moment at the top, then slowly lower your legs back down to the starting position.
  5. Step 5: Repeat for the desired number of repetitions.

Sets, reps and programming

Suggested sets, reps and rest for the lying leg raise flat bench by training goal
Goal Sets Reps Rest Effort
Strength 3–5 3–6 3–5 min 1–3 reps in reserve
Muscle growth 3–4 6–12 2–3 min 1–2 reps in reserve
Muscular endurance 2–3 12–20 1–2 min 1–3 reps in reserve

Ranges follow the ACSM position stand on progression in resistance training. Muscle grows across a wide range of loads when sets end close to failure (Schoenfeld et al., 2017), longer rests between heavy sets support strength and size (Schoenfeld et al., 2016), and stopping a rep or two short of failure works about as well as training to failure (Grgic et al., 2022). Estimate your working weights with the strength calculators.

Lying Leg Raise Flat Bench alternatives

More exercises that train the abs as their main target:

More abs exercises

See the best ab exercises, ranked →

Sources

  1. American College of Sports Medicine. Progression models in resistance training for healthy adults. Med Sci Sports Exerc. 2009;41(3):687-708.
  2. Schoenfeld BJ, Grgic J, Ogborn D, Krieger JW. Strength and hypertrophy adaptations between low- vs. high-load resistance training. J Strength Cond Res. 2017;31(12):3508-3523.
  3. Schoenfeld BJ, Pope ZK, Benik FM, et al. Longer interset rest periods enhance muscle strength and hypertrophy in resistance-trained men. J Strength Cond Res. 2016;30(7):1805-1812.
  4. Grgic J, Schoenfeld BJ, Orazem J, Sabol F. Effects of resistance training performed to repetition failure or non-failure on muscular strength and hypertrophy: a systematic review and meta-analysis. J Sport Health Sci. 2022;11(2):202-211.

Step-by-step instructions and demonstration media are from the ExerciseDB exercise dataset.

This guide is general fitness information, not medical advice. Stop if an exercise causes pain and speak to a doctor or physiotherapist about injuries or health conditions before starting a new programme.