Your knees should be slightly bent.
So, how do I stay fit? Pressing your feet on the ground and squeezing your glutes, drive your hips up off the floor into a bridge position.
Once you nail down proper form, you can even carry a pair of dumbbells when doing the exercise to work your arms and legs.
And third, you need people to be accountable to.
Time to make foods your friend? Instead of counting one up-down motion as one rep, try following a 3:0:1 tempo, which involves three seconds during the eccentric phase squatting down to touch the box with your butt and one second during the concentric phase standing up.
You can also clasp your hands together to make a fist.
The solution for this, as explained in Fit After 50 is Metabolic Strength Training, which boosts your testosterone levels and keeps your estrogen and cortisol on the low.
Do three sets of ten reps.