title: Volume-equated high- and low-repetition daily undulating programming strategies produce similar hypertrophy and strength adaptations.
abstract: The overarching aim of this study was to compare volume-equated high-repetition daily undulating periodization (DUPHR) versus a low-repetition daily undulating periodization (DUPLR) program for muscle performance. Sixteen college-aged (23 ± 3 years) resistance-trained males were counterbalanced into 2 groups: (i) DUPHR (n = 8), with a weekly training order of 12 repetitions (Day 1), 10 repetitions (Day 2), and 8 repetitions (Day 3); and (ii) DUPLR (n = 8), with a weekly training order of 6 repetitions (Day 1), 4 repetitions (Day 2), and 2 repetitions (Day 3). Both groups trained 3 times/week for 8 weeks on nonconsecutive days, with pre- and post-training testing during weeks 1 and 8. Participants performed only squat and bench press exercises each session. Changes in one-repetition maximum (1RM) strength, muscle thickness (MT), and muscular endurance (ME) were assessed. Both groups significantly increased 1RM strength for both squat and bench press (p < 0.01), and no group differences existed (p > 0.05). Similarly, both groups experienced significant increases in chest, lateral quadriceps distal, and anterior quadriceps MT (p < 0.05), but no change was present in either group for lateral quadriceps mid MT (p < 0.05). No group differences were discovered for changes in MT (p > 0.05). ME did not significantly change in the squat or bench press for either group (p > 0.05); however, for squat ME, a moderate effect size was observed for DUPHR (0.57) versus a trivial effect size for DUPLR (0.17). Our findings suggest that in previously trained males, training volume is a significant contributor to strength and hypertrophy adaptations, which occur independently of specific repetition ranges.
authors.affiliation: Department of Exercise Science and Health Promotion, Muscle Physiology Laboratory, Florida Atlantic University, Boca Raton, FL 33431, USA.|Department of Exercise Science and Health Promotion, Muscle Physiology Laboratory, Florida Atlantic University, Boca Raton, FL 33431, USA.
authors.forename: Alex
authors.initials: A
authors.lastname: Klemp
authors.affiliation: Department of Exercise Science and Health Promotion, Muscle Physiology Laboratory, Florida Atlantic University, Boca Raton, FL 33431, USA.|Department of Exercise Science and Health Promotion, Muscle Physiology Laboratory, Florida Atlantic University, Boca Raton, FL 33431, USA.
authors.forename: Chad
authors.initials: C
authors.lastname: Dolan
authors.affiliation: Department of Exercise Science and Health Promotion, Muscle Physiology Laboratory, Florida Atlantic University, Boca Raton, FL 33431, USA.|Department of Exercise Science and Health Promotion, Muscle Physiology Laboratory, Florida Atlantic University, Boca Raton, FL 33431, USA.
authors.forename: Justin M
authors.initials: JM
authors.lastname: Quiles
authors.affiliation: Department of Exercise Science and Health Promotion, Muscle Physiology Laboratory, Florida Atlantic University, Boca Raton, FL 33431, USA.|Department of Exercise Science and Health Promotion, Muscle Physiology Laboratory, Florida Atlantic University, Boca Raton, FL 33431, USA.
authors.forename: Rocky
authors.initials: R
authors.lastname: Blanco
authors.affiliation: Department of Exercise Science and Health Promotion, Muscle Physiology Laboratory, Florida Atlantic University, Boca Raton, FL 33431, USA.|Department of Exercise Science and Health Promotion, Muscle Physiology Laboratory, Florida Atlantic University, Boca Raton, FL 33431, USA.
authors.forename: Robert F
authors.initials: RF
authors.lastname: Zoeller
authors.affiliation: Department of Exercise Science and Health Promotion, Muscle Physiology Laboratory, Florida Atlantic University, Boca Raton, FL 33431, USA.|Department of Exercise Science and Health Promotion, Muscle Physiology Laboratory, Florida Atlantic University, Boca Raton, FL 33431, USA.
authors.forename: B Sue
authors.initials: BS
authors.lastname: Graves
authors.affiliation: Department of Exercise Science and Health Promotion, Muscle Physiology Laboratory, Florida Atlantic University, Boca Raton, FL 33431, USA.|Department of Exercise Science and Health Promotion, Muscle Physiology Laboratory, Florida Atlantic University, Boca Raton, FL 33431, USA.
authors.forename: Michael C
authors.initials: MC
authors.lastname: Zourdos
mesh_terms: D000222:Adaptation, Physiological; D050154:Adiposity; D000328:Adult; D006801:Humans; D006984:Hypertrophy; D008297:Male; D053580:Muscle Strength / Q000502:physiology*; D018482:Muscle, Skeletal / Q000502:physiology*; D010807:Physical Endurance; D055070:Resistance Training; D011795:Surveys and Questionnaires; D055815:Young Adult
keywords: adaptation musculaire; entraînement contre résistance; entraînement à la force; muscle adaptation; muscle squelettique; resistance training; skeletal muscle; strength training