Journal of Sports Research 2413-8436 2410-6534 10.18488/journal.90.2018.51.40.48 Journal of Sports Research Implementation of a Personalized Weight Training Protocol and Influence of Sleep Duration Journal of Sports Research Journal of Sports Research 03-2018 2018 03-2018 03-2018 5 1 40 48 15 Nov 2018 10 Dec 2018 Weight (resistance) training can increase strength and muscle mass. A personalized training protocol (i.e., with optimum frequency and number of sets) was followed for 4 months by a 40-year old male with 20 years of weight training experience. The body was split in three parts and was trained every 5-6 days. The strength increase was between 7% (back) and 17% (legs), while the free-fat mass increase was 0.4 kg (0.5%), which was lost after the 4-month period. It was shown that reduced sleep duration for one night did not affect the strength performance. However, with 2 days of reduced sleep, there were indications of worse performance. The results confirm the importance of personalized weight training programs and good sleep habits for strength improvements.