With respect to use of a target rifle in hunting: During my healthy and much-younger years, my pet hunting rifle weighed 9.5 pounds. 4.4 kilos. I did many and many a walking hunt of fifteen kilometers or more in desert mountain country, about 1,300 meters above sea level. 1.8 meters in height and 82 kilos in weight did not make me any sort of Mr. Muscle.
So, for relatively short walks to a stand, a heavy rifle is (IMO) no big deal.
It's less about strength and more about physical condition.
As far as dealing with recoil, modern recoil pads such as the LimbSaver are far superior to those of past decades.
You're from BATFE? Come right in! I use all your fine products!