Sleep for Muscle Size
Sleep has to be the most under appreciated in any athlete's armoury.
Academic studies have demonstrated that there is a direct colleration betwwen sleep and mucle growth . We are not just talking about bodybuilding here, it's any athletic discpline.
Sleep is an anabolic state that allows muscular and cellular systems to rejunvenate and repair.
Growth hormone, or somatotropin, is released in surges throughout the day and night, but the largest releases occur when you are asleep. Sleep deprivation has been shwon to suppress human growth hormone release. 
If you are going to achieve your goals in the gym you need good quality sleep.
Sleep for Strength & Performance
It has also been demonstrated through academic studies that sleep also affects strength.
A large scale study involving over 10,000 particpants showed that differences in muscle strength between those who sleep only 6 hours and those getting 7 or 8 hours.
Studies have also shown significant changes in weight lifting performance due to sleep deprivation. 
Sleep facilitates the production of anabolic hormones such as testosterone and HGF which enable muscle repair, reducing your recovery time.
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- Reilly, Piercy. The effect of partial sleep deprivation on weight-lifting performance. (source)
- Takahashi Y, Kipnis DM, Daughaday WH (September 1968). "Growth hormone secretion during sleep". The Journal of Clinical Investigation. 47 (9): 2079–90. doi:10.1172/JCI105893. PMC 297368. PMID 5675428. (source)
- Mullington J, Hermann D, Holsboer F, Pollmächer T (September 1996). "Age-dependent suppression of nocturnal growth hormone levels during sleep deprivation". Neuroendocrinology. 64 (3): 233–41. doi:10.1159/000127122. PMID 8875441. S2CID 3328167. (source)
- Chen Y, Cui Y, Chen S, Wu Z. Relationship between sleep and muscle strength among Chinese university students: a cross-sectional study. J Musculoskelet Neuronal Interact. 2017;17(4):327-333. (source)
- Thomas Reilly & Mark Piercy (1994) The effect of partial sleep deprivation on weight-lifting performance, Ergonomics, 37:1, 107-115, DOI: 10.1080/00140139408963628 (source)
- Theresa M. Buckley, Alan F. Schatzberg. On the Interactions of the Hypothalamic-Pituitary-Adrenal (HPA) Axis and Sleep: Normal HPA Axis Activity and Circadian Rhythm, Exemplary Sleep Disorders. 1 May 2005 (source)
- Pistollato et al. Associations between Sleep, Cortisol Regulation, and Diet: Possible Implications for the Risk of Alzheimer Disease . 2016 Jul; 7(4): 679–689. (source)
- P Monteleone, M Maj, L Beinat, M Natale, D Kemali. Blunting by chronic phosphatidylserine administration of the stress-induced activation of the hypothalamo-pituitary-adrenal axis in healthy men. 1992;42(4):385-8. (source)
- Deepak Langade, Subodh Kanchi, Jaising Salve, Khokan Debnath, and Dhruv Ambegaokar. Efficacy and Safety of Ashwagandha (Withania somnifera) Root Extract in Insomnia and Anxiety: A Double-blind, Randomized, Placebo-controlled Study. 2019 Sep; 11(9): e5797. (source)
- Raut et al. Exploratory study to evaluate tolerability, safety, and activity of Ashwagandha (Withania somnifera) in healthy volunteers. 2012 Jul;3(3):111-4. (source)
- K Chandrasekhar, Jyoti Kapoor, Sridhar Anishetty. A prospective, randomized double-blind, placebo-controlled study of safety and efficacy of a high-concentration full-spectrum extract of ashwagandha root in reducing stress and anxiety in adults. 2012 Jul;34(3):255-62 (source)
- Erik M Olsson, Bo von Schéele, Alexander G Panossian. A randomised, double-blind, placebo-controlled, parallel-group study of the standardised extract shr-5 of the roots of Rhodiola rosea in the treatment of subjects with stress-related fatigue. 2009 Feb;75(2):105-12. (source)
- Yevgeniya Lekomtseva, Irina Zhukova, Anna Wacker. Rhodiola rosea in Subjects with Prolonged or Chronic Fatigue Symptoms: Results of an Open-Label Clinical Trial. 2017;24(1):46-52. (source)
- Han et al. Effects of red ginseng extract on sleeping behaviors in human volunteers. 2013 Sep 16;149(2):597-9. (source)
- Lee et al. Repeated Administration of Korea Red Ginseng Extract Increases Non-Rapid Eye Movement Sleep via GABAAergic Systems. 2012 Oct; 36(4): 403–410. (source)