- supported by Rhea et al. (2002), Monteiro et al. (2009), Prestes (2009), Miranda et al (2011) and Simao (2012), but
- refuted / questioned by Baker et al. (1994), Bufford et al. (2007) and Kok et al. (2009),
Personally, I like to dabble with both undulating, but also with intra-workout "periodization" a la "Dr. Squat" (see box to the right) while I hate, and I mean "hate" as in totally detest, these lame 4-week cylces of doing the same stuff every workout. The "I hate ..." argument may not sound as if it would hardly qualify as being "SuppVersity Approved", but it in fact is. I am the last person to suggest you drag yourself to the gym and do something you hate. That's not going to be productive, trust me - no matter what science says, by the way.
- Baker D, Wilson G, Carlyon J. Periodization: the effect on strength of manipulation volume and intensity. J Strength Cond Res1994;8:235-42.
- Bufford TW, Rossi SJ, Smith DB, Warren AJ.A comparison of periodization models during nine weeks with equated volume and intensity for strength. J Strength Cond Res. 2007;21:1245-50.
- Kok LY, Hamer J, Bishop DJ. Enhancing muscular qualities in untrained women: linear versus undulating periodization. Med Sci Sports Exerc 2009;41:1797-807.
- Miranda F, Simão R, Rhea M, Bunker D, Prestes J, Leite RD, et al. Effect of linear vs. ondulatory periodized resistance training on maximal and submaximal strength gains. J Strength Cond Res. 2011;25:1824-30.
- Monteiro AG, Aoki MS, Evangelista AL, Alveno DA, Monteiro GA, Piçarro IC, et al. Nonlinear periodization maximizes strength gains in split resistance training Stone routines. J Strength Cond Res 2009;23:1321-6
- Prestes J, Frollini AB, Lima C, Donatto FF, Foschini D, Marqueti R, et al. Comparison between linear and daily undulating periodized resistance training to increase strength. J Strength Cond Res. 2009;23:2437-42.
- Rhea MR, Ball SD, Phillips WT, Burkett LN. A comparison of linear and daily undulating periodized programs with equated volume and intensity for strength. J Strength Cond Res2002;16:250-5.
- Simão R, Spineti J, Salles BF, Oliveira L, Matta TT, Fleck SJ. Comparison between linear and nonlinear periodized resistance training: strength and muscle thickness effects. J Strength Cond Res. 2012;26:1389-95.
- Spinetti J, et al. Comparison Between Different Periodization Models On Muscular Strength And Thickness In A Muscle Group Increasing Sequence. Rev Bras Med Esporte. 2013; 19(4).