Male model ex_AZC5C7

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Waist · Body Weight

Bottoms-Up Half Rep

beginnerstrength

Bottoms-Up Half Rep is a beginner isolation strength exercise that works the abs (waist), with the hip flexors assisting. It needs no equipment beyond your own body weight. A typical prescription is 3 sets of 10-15 reps, and it burns about 4.3 calories per minute.

Target
Abs
Body part
Waist
Equipment
Body Weight
Category
Strength
Mechanic
Isolation
Force
Push
Sets × reps
3 × 10-15
Calories / min
≈ 4.3 kcal

Primary muscles

  • Abdominals · Rectus Abdominis, Lower Abs

Secondary muscles

  • Hip Flexors · Iliopsoas

How to do Bottoms-Up Half Rep

  1. Lie on your back with your legs extended just off the floor and your arms resting on the floor by your sides.
  2. Bend your knees towards your chest, stopping when your upper legs are vertical to the floor.
  3. Lower your legs back down without letting them touch the floor.
  4. Repeat the movement for the desired number of repetitions.

Form tips

  • Keep your core engaged throughout the exercise to maintain stability and support your lower back.
  • Perform the movement slowly and with control to maximize muscle activation and prevent injury.
  • Focus on using your lower abdominal muscles to lift and lower your legs.

Bottoms-Up Half Rep alternatives

More abs exercises

Bottoms-Up Half Rep FAQ

What muscles does Bottoms-Up Half Rep work?

Bottoms-Up Half Rep mainly works the abs in the waist (Rectus Abdominis and Lower Abs). The hip flexors work as secondary muscles.

What equipment do you need for Bottoms-Up Half Rep?

None. Bottoms-Up Half Rep is a body weight exercise, so you can do it at home or anywhere with enough space.

How many sets and reps of Bottoms-Up Half Rep should I do?

Start with 3 sets of 10-15 reps. Pick a load or variation where the last one or two reps are hard but your form stays clean.

Is Bottoms-Up Half Rep good for beginners?

Yes. Bottoms-Up Half Rep is rated beginner, so it's a sound choice while you learn to train the abs.

How many calories does Bottoms-Up Half Rep burn?

About 4.3 calories per minute for a person of around 70 kg, based on a MET value of 3.5. Ten minutes of work is roughly 43 calories; heavier people burn more.

What is a good alternative to Bottoms-Up Half Rep?

Other exercises for the abs include Dumbbell v-Up, Dumbbell Overhead Sit-Up, Band Decline Sit Up and Dumbbell Decline Sit-Up.

For developers

Use Bottoms-Up Half Rep in your app

Get this exercise and 1,900+ others from the WorkoutX API: 720p MP4 animations at 30 fps without the watermark, male and female models, muscles, instructions and form tips in 7 languages.

# One request returns the exercise and its 720p media links
curl "https://api.workoutxapp.com/v2/exercises/ex_AZC5C7" \
  -H "X-WorkoutX-Key: YOUR_API_KEY"

{
  "id": "ex_AZC5C7",
  "name": "Bottoms-Up Half Rep",
  "model": "male",
  "target": "Abs",
  "equipment": "Body Weight",
  "media": {
    "mp4": "https://…/ex_AZC5C7/mp4-720.mp4?…",
    "poster": "https://…/ex_AZC5C7/poster.jpg?…"
  }
}