how to build stamina?
hi. i recently started my fitness journey again, at 74 kg rn, and 18. in 2020 i went down to my goal weight 54 kg (5'5 165 cm) but regained almost all. used to walk outside a lot, but at a moderate pace, not too fast. started the gym yesterday and i only plan on using the treadmill for weight loss and will tone my body…