Home / Unbreakable Spartan Training Box Jumps: Featured Workout of the Day Exercise By Jason Jaksetic · January 01, 2017 Share Facebook Share on Facebook Tweet Tweet on Twitter Pin it Pin on Pinterest Whatsapp Share on Whatsapp Email Do your box jumps. Amp up your fitness and wellness routine NOW. Click here to find a Spartan Race close to you! Bodyweight HIIT Strength Training workouts Jason Jaksetic Jason Jaksetic is an SGX coach and a go-to guy for all things involving a Spartan lifestyle. He enjoys doing Ultra-Beasts and Double Anvil Triathlons (4.8 mile swim, 224 mile bike, 52.4 m run). He once lived in a barn and really enjoyed it.