Merino wool here as well. They seem to build up smell less than synthetic. As others mention too, so many other scent carriers on the body. Playing the wind is always you best bet.
Late 40’s here. Been elk hunting since I was a teen. I try to stay fit throughout the year. Strength training major muscle groups through the week (squats/lunges, dumbbell chest press and shoulder press, dumbbell rows, lots of core work for low back and abs). Cardio wise, I make sure to move...