Arms/groups completed 1 week of testing to establish baseline measurements of cognitive abilities, physical fitness, and brain structure/function. 16 weeks of various intervention protocols. These protocols could include single or multiple intervention type(s) with varying schedules. Three 70-min training sessions were completed per week, so all arms completed 56 hours of training, total. Following completion of the intervention period was 1 week of post-assessment to measure changes in cognitive abilities, physical fitness, and brain structure/function.