Manik said:
Convict conditioning, CrossFit, and the seal program are the best iv seen as far as overall fitness programs. Really, all you need is a pull-up area, and a waight vest and 2 chairs. You can get in about any shape you want with just that. As long as you really focus on progressive overload, any of these programs will give results. CrossFit is perfect for gaining size while building functionality as well. As a fighter, CrossFit style workouts improved about every level of fitness for me and others. Iv never tried tacfit, but that's definitely next.
I disagree. They are not complete programmes by any means. Like I expressed in a recent post, people tend to focus excessively on shape and strength. But physical development has a wealth of other parameters that the programmes you mentioned do not cover. These parameters matter a lot as well. Not to mention, these programmes are more limited than other options for strength development, as building size limits your strength and power potential, not to mention changes from these programmes are only SEMI-transferable to real life, whereas there are athletic opportunities which offer great development and greater transfer. For example, they work with max 3 times your bodyweight, whereas there are training systems that use much more than that without issue. Weights can never fill that gap.
SSinHeartandSoul also mentions many important concerns. His "especially if someone doesn't know what they are doing" applies to 99.9% of those who use weighted vests and similar training system, as they haven't strengthened their joints through tendon nei kung, yijin jing and similar practices.