“…18 The selection of an adequate load for the tendon is thus of utmost importance to induce structural modifications which will improve its resistance and function, thus promoting the healing process. 15,17,19 Over the past 35 years, many studies have attempted to quantify the load borne by the Achilles tendon during various activities, such as cycling, 20,21 walking, 15,[22][23][24][25][26][27] running, 15,22,24,25,[27][28][29][30][31][32][33][34][35][36][37] and strengthening exercises performed with or without additional load. 15,22,25,[38][39][40][41][42][43] To date, no clear progression including all categories of exercises involving the Achilles tendon has been established.…”