I have a vest that I can put little pre-weighed shot packets in. I regularly build up to training with 100 lbs in the vest. There's a climbing trail in Giant City Park where I live. Leading up to a hunt I build up to training for 3 hours a day, 5 days a week, with the vest on. This year I'm [bleep] because of my knee, but I'll be back in shape soon enough. There's not much I can do to replicate the lack of oxygen at higher elevations except to add more weight to the vest. I also carry a 10 lb weight in each hand once I've started the weight vest training.
