This is one of those exercises which feels like it is working pretty much everything.
Primarily it is a core exercise that focuses on keeping the ab muscles stable whilst moving.
After that it is a leg exercise as you are doing split squats. Due to the pull of the band, you will likely find your butt muscles are working overtime to stop you from being pulled over.
This can be done using a cable machine or a resistance band.
• Secure a resistance band around a bench or solid object. Hold the band in each hand.
• Stand sideways to point of attachment and hold band with both hands.
• Take a large side step away from cable machine to take away any slack in band.
• Stand tall with feet around shoulder width apart and abdominals braced together. Shoulders pulled back and down.
• Hands should be together, touching lower chest / sternum.
• Breathe out and push handle directly forwards, away from body until arms are fully extended and parallel to floor. Hold this position during set
• Take a large step backwards into a staggered stance. Back leg is straight with heel off floor. This is the start position.
• Keep torso upright or in a slight forward lean, bend both knees and lower hips straight down towards floor.
• Lower until knees are bent approximately 90 degrees but stop before back knee touches floor.
• To reverse, press front heel into floor and squeeze butt muscles to raise hips straight up and return to start position.
• Repeat all reps on one side before switching sides
This is my, mostly, Personal Trainer musings and information which I hope you'll find helpful!