Can weak people still hit strong balls with proper technique?
I'm a beginner and still working on my technique to improve.
I have probably below-average muscles on my arms as I've started tennis in my late 30s and always did an office job.
My racket is considered light (270g unstrung, 50 tension), Babolat evo drive.
My club coach (no private lesson) sometimes feedbacks me that I shouldn't drop the racket so much when hitting forehand, instead I should swing higher with extended arm.
I often use the weight of the racket to funnel momentum from top to down, so I don't need to use too much of arm muscles to hold the racket high, but by doing this I often seems to hit lower to the ground.
When I try to use much more my muscles and hold the racket higher, I definitely feel much more stress on my forearm and elbow, and I feel I'm hitting with less control using more energy, so I can't do it that often, but the teacher seems to prefer that.
Is it "just" a technique problem, or people with weak muscles could have this sort of disadvantage?