When it comes to workouts, we’re all about efficiency: “How can I get the most done in the least amount of time?” Sound familiar? The STRONGER workout program, developed by LIVESTRONG.COM and celebrity trainer and former professional soccer player Nicky Holender, was created with just this in mind. The goal of STRONGER is to provide the most efficient and effective full-body do-anywhere workouts in 40-minutes or less – COMPLETELY FREE. The workouts are challenging but they deliver results, and – most importantly – the program offers modification options for each of the movements. Read on to see the 15 most challenging moves in the program – promising to challenge you physically and mentally and get you in the best shape of your life. Modifications are explained and photos help to show how to do each move, so you can practice to ensure the correct form. To read more click here!