Discovering Work Capacity and Cross-Training

Today’s guest is Jack Barry. Jack is the founder of JB Performance and a former ABCA DIII All-American (York College, 2021) who played at Salisbury University. After college, he worked at Tread Athletics, then built a remote+in-person coaching model. Jack has coached athletes from high school to pro levels, appeared on Baseball America’s 90th Percentile, and hosts the “Just Rippin’” podcast. On today’s episode, Jack speaks on athletic potential as a function of work capacity with quality, deliberate practice. We unpack the mental side of training, how visualization, targeted self-talk, and timely pattern breaks calm performance anxiety and restore confidence. He also touches on how athletes thrive when they develop a unique identity, balance effort with recovery, and treat mindset and mechanics as equal partners. This is a dynamic episode, at the intersection of pitching skill and global human performance concepts. Today’s episode is brought to you by Hammer Strength and LILA Exogen wearable resistance. Use the code “justfly25” for 25% off any Lila Exogen wearable resistance training, including the popular Exogen Calf Sleeves. For this offer, head to Lilateam.com Use code “justfly10” for 10% off the Vert Trainer View more podcast episodes at the podcast homepage. (https://www.just-fly-sports.com/podcast-home/) Timestamps 0:20 – From college ball to new competitive outlets4:10 – Work capacity, family influences, and cross-training7:10 – Adapting training: speed, volume, and specificity10:01 – Aerobic contributions in racket and throwing sports15:46 – Provoking reactivity: stumble drills and innate responses23:16 – Pattern breaks, the yips, and the "be sexy" mentality27:44 – Reactive throwing drills to clean the arm action31:15 – Pre-movement cues and subtle distractions to speed action43:21 – Visualization with highlight reels to build confidence52:25 – Essentialism in training: less and better59:50 – Start with less, progress intelligently1:00:25 – Barefoot training and simplifying the lower half Actionable takeaways 0:20 – From college ball to new competitive outlets Jack traces his path from Division III Salisbury baseball into jiu-jitsu, tennis, and a renewed love for training after leaving team sport. Treat post-playing transitions as a chance to experiment with new sports that satisfy the competitive impulse. Use cross-training to keep motivation high while developing complementary athletic qualities. When exploring a new sport, accept the beginner phase and enjoy the novelty rather than forcing immediate mastery. 4:10 – Work capacity, family influences, and cross-training Jack reflects on family genetics and finding his own work-capacity strengths through varied activities. If you enjoy sustained effort, program both volume and varied intensity (easy long efforts plus specific speed sessions). Use cross-training (racket sports, running, court games) to get game-like cardiovascular stimulus without burnout. Be deliberate: split session types by purpose (speed sessions, volume sessions, tempo work) instead of lumping everything together. 7:10 – Adapting training: speed, volume, and specificity Jack describes learning to periodize his running and mix speed with volume to actually get faster. Structure sessions by purpose: separate longer aerobic efforts from targeted speed work. Progress volume conservatively (small weekly increases) and add specific speed work for real improvements in pace. Treat running like any other modality: apply progressive overload principles and discipline. 10:01 – Aerobic contributions in racket and throwing sports Jack compares racket sports and throwing, noting the reactive and aerobic demands of court play. Use court-based conditioning to develop reactive stamina and contextual decision-making. Choose cross-training that mirrors sport constraints when possible (racket sports for reactive throws).