Log in
Search here
Building a workout
Creating a training
Training timeline
Effects timeline
Sound timeline
Screen timeline
Participant timeline
Preparing a workout
Rowing handbook
Basic rowing technique Technical rowing exercises Rowing drills Performance data
Ground exercises handbook
Bent-over row Biceps curl Bicycles Bird dog Burpees Clamshell Crunches Dead bug Deadlift Donkey kicks Fire hydrants Flutter kicks Forward fold Frog glute lifts Froggers Heel touches High knees High plank Hip bridges Hundreds Inchworm Jumping Jacks Kettlebell swing Leg raises Low plank Lunge Man makers Mountain climbers Push-ups Reversed plank Runners Seated twist Side lunges Side plank Sit-ups Squats Standing side leg raises Sumo squats Swimmers Triceps kickback Upright row V-sit
Teaching a workout
Best practices
Introduction Timing Communication Motivation
Studio screens
Average stroke rate & split Power meter Power total Stroke rate Time / distance race
Participant screens
QR Code / Login Get ready Power curve Power meter Stroke rate Power top Time / distance race
Support
Opening & Closing procedure
Troubleshooting
Contact

Copyright Jezzr / info@jezzr.nl

Crunches

Execution

  1. Start with your back on the ground. Knees bend and feet on the ground.
  2. Put your hands behind your head.
  3. Turn on your abs and lift your upper back slightly off the floor. Keep your feet on the ground.
  4. Slowly lower back down to the ground and repeat.

Points of attention

  • Keep your chest lifted.
  • Chin to your chest. Don’t use your neck muscles as you try to move up.

Variations

PROGRESSION
  • Hold the crunch for a few seconds at the top.
  • Hold a dumbbell, kettlebell or medicine ball stretched out in front of you.
REGRESSION

Make the movement smaller. Just make sure to work your abs.

Muscles involved

  • Abdominals
  • Hip flexors