How to sit in a Muskoka chair, and how to get out of one
Push down on the arms. That is what they are for.
Sitting down
Stand with the backs of your knees at the front edge. Put a hand on each arm — they are exactly where your hands fall — and lower yourself. Do not perch on the front; slide back until your hips find the low point of the seat. Now lean. The back is waiting.
Staying there
Feet out in front. If you have the ottoman, feet on it, and the recline is complete: no pressure at the knees, none at the lower back, the arms holding your shoulders up. This is the position the chair was designed for, and it is the reason a Muskoka chair is the one people fall asleep in.
The drink
On the arm. Five and a half inches was chosen for a glass with room to spare. A plate fits. A book fits. A laptop, technically, fits.
Getting out
Feet flat on the ground, pulled back toward the chair. Both hands on the ends of the arms. Lean forward until your nose is over your knees, then push down on the arms and stand. It is one smooth movement once you have done it twice. The chair is low and reclined on purpose; the wide arms are the counterweight to that, and they make it easier than a low sofa.
If it is genuinely hard
For anyone with knees or hips that object to a fifteen-inch seat, a firm cushion adds two inches and changes everything, and the side table beside the chair gives a third hand. It is worth knowing before buying for a parent.