Concurrent Training

Strength and Endurance Training

Recumbant Stepper

Studies show that concurrent strength and endurance training can have an inhibitory effect on the development of both strength and endurance (Nelson 1990) or strength only (Hennessy & Watson 1994). Other studies found no inhibitory effect with concurrent strength and endurance training (Sale 1990, Bell 1991, Hortobagyi 1991).

Enhancement of Cardio Performance

A study by Hickson et al. (1988) found that adding strength training to endurance training enhances short-term, high intensity endurance and does not inhibit aerobic function or performance.

When performed in succession, Chtara, et. al (2005) found that strength circuit training immediately after individualized endurance training in the same session produced greater improvement in the 4 km time trial and aerobic capacity than the opposite order or each of the training programs performed separately.

Concurrent sprint interval training and strength training does not inhibit strength gains when compared to strength training alone, however, the addition of sprint interval training improves aerobic performance measurements such as VO2max (Cantrill 2014).

Endurance Work Inhibits Power

Strongman Log Lift

Dudley & Djamil (1985) reported concurrent strength and endurance training in the same muscle does not inhibit cardiovascular improvement (VO2 max), however, it did reduce the ability to increase peak torque at fast velocities. Slow velocity contraction was unaffected. Similarly, a study by Kraemer et al. (1995) demonstrates that strength training does not impair endurance training adaptations, however, endurance training can inhibit speed and power development by decreasing the Type I muscle fibers.

Santtila et al. (2009) studied military basic training of the Finnish Defense Forces. They concluded that a large amount of endurance-based military training interfered with the soldier's strength and power development.

Effects on Deconditioned Subjects

Deconditioned subjects may not experience an inhibitory effect when strength and endurance training is combined. Simultaneous strength and endurance training does not appear to negatively influence power, strength and aerobic fitness development in girls following a detraining period (Santos 2011) or sedentary college aged women (Volpe 1993). Hickson (1980) reported that concurrent strength and endurance training inhibited strength development only after the 8th week of training but did not affect the magnitude of increase in VO2max.

Although strength improvements are seen with concurrent strength and endurance programs, muscle fiber growth is inhibited as compared to those that perform strength training alone (Karavirta 2011).

Techniques to Lessen Concurrent Training Inhibition

Cycling appears to be somewhat less disruptive to strength adaptations as compared to running. The author theorizes cycling is slightly less disruptive to strength gains since the cycling biomechanics more closely resemble multi-joint strength training movements such as the Leg Press or the Squat. (Gergely 2009).

Santtila et al. (2009) suggested that the Finnish Defense Forces decrease in the amount of endurance-based military training and/or an increase in the amount of maximal explosive strength training in their basic training protocols in order to optimize strength and power development in their soldiers.

Overreaching and overtraining have been proposed as possible reasons for the inhibition of progress during concurrent training. Hormonal changes associated with overtraining inhibit type 1 muscle fibers hypertrophy. Adequate recovery reduced training volume, and well-planned periodization techniques (eg: classic periodization or block periodization) may allow for progress in multiple fitness components (Kraemer 2012). Kraemer (2012) also makes additional suggestions:

  • Conduct training needs analysis
    • match training with sports requirements
  • Elimination of extraneous training
    • which does not match the metabolic demands of the sport
    • more aerobic training than what is required
    • exercise as a punishment
  • Insure adequate resistance training stimuli
  • Value quality over quantity
  • Value recovery and rest in a conditioning program
  • Decrease prolonged periods of high intensity coupled with high volume
  • Monitor progressions and capacities
    • Implement sports practice assessments

See Coach Boyle on Aerobic Training Compromises Sports Conditioning. Also see Common Training Mistakes and Training Principles.


Cantrell GS, Schilling BK, Paquette MR, Murlasits Z. (2014). Maximal strength, power, and aerobic endurance adaptations to concurrent strength and sprint interval training. Eur J Appl Physiol. Jan (Epub).

Chtara M, Chamari K, Chaouachi M, Chaouachi A, Koubaa D, Feki Y, Millet GP, Amri M (2005). Effects of intra-session concurrent endurance and strength training sequence on aerobic performance and capacity. Br J Sports Med. 39: 555-560.

Dudley GA, Djamil R (1985). Incompatibility of endurance- and strength-training modes of exercise. J Appl Physiol. 59(5): 1446-51.

Gergley JC (2009). Comparison of two lower-body modes of endurance training on lower-body strength development while concurrently training. J Strength Cond Res. 23(3): 979-87.

Hennessy LC, Watson AWS (1994). The interference effects of training for strength and endurance simultaneously. J Strength Cond Res. 8: 12–19.

Hickson RC (1980). Interference of strength development by simultaneously training for strength and endurance. Eur J Appl Physiol Occup Physiol. 45(2-3): 255-63.

Hickson RC, Dvorak BA, Gorastiaga EM, Durowski TT, Foster C (1988) Potiential for strength and endurance training to ampliffy endurance performance J Appl Physiol. 65(5): 2285-2290

Hortobagyi T, Katch FI, & Lachance PF (1991). Effects of simultaneous training for strength and endurance on upper and lower body strength and running performance. The Journal of Sports Medicine and Physical Fitness, 31, 20-30.

Karavirta L, Häkkinen A, Sillanpää E, García-López D, Kauhanen A, Haapasaari A, Alen M, Pakarinen A, Kraemer WJ, Izquierdo M, Gorostiaga E, Häkkinen K (2011). Effects of combined endurance and strength training on muscle strength, power and hypertrophy in 40-67-year-old men. Scand J Med Sci Sports. 2011 Jun; 21(3): 402-11.

Kraemer WJ, Patton JF, Gordon SE, Harman EA, Deschenes MR, Reynolds K, Newton RU, Triplett NT, Dziados JE (1995). Compatibility of high-intensity strength and endurance training on hormonal and skeletal muscle adaptations. J Appl Physiol. 78(3): 976-89.

Kraemer WJ (2012). Gary Dudley Lecture: Compatibility of Training Programs: Problems and Solutions. NSCA National Conference and Exhibition, Providence, RI.

Nelson AG, Arnall DA, Loy SF, Silvester LJ, Conlee RK (1990). Consequences of combining strength and endurance training regimens. Phys Ther. 70(5): 287-94.

Sale DG, MacDougall JD, Jacobs I, Garner S (1990). Interaction between concurrent strength and endurance training. J Appl Physiol (1985). 68(1): 260-70.

Santos AP, Marinho DA, Costa AM, Izquierdo M, Marques MC (2011). The effects of concurrent resistance and endurance training follow a specific detraining cycle in young school girls. Journal of Human Kinetics. 29A: 93–103.

Volpe S, Walberg-Rankin J, Rodman K, Sebolt D (1993). The Effect of Endurance Running on Training Adaptations in woman Participating in a Weight Lifting Program. Restriction on Strength Performance. Nat Strength Cond Assoc J. 7: 101–107.

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