There are two schools in the wonderful world of laptops. Apple and Microsoft, OK maybe three with all the others. All have pros and cons but Apple is probably the one that keeps your fit.
Apart from shifting about the globe, or the house using energy with said machine tucked under your arm their much reduced weight and volume of these modern beasts of burden in modern society have steadily reduced. This requires less effort. But the hidden benefit is the distance walked when using the device. Ah ha you might say this is purely the distance from A to B and common to all, but with Apple it is the distance from A to B to A to B to A to B. This is due to the design of the Apple Mac which is devoid of all connections. You are constantly returning to A to pick up the damn adaptor that lets you use a USB et al. And of course back again when you return to base. It drives me crackers, witness this blog! But in days of lockdown the exercise is I suppose much needed.