> Mostly I’ve heard that this is because your testosterone levels drop significantly after ejaculation, and you need that testosterone to make gains.
First, I doubt high T is needed to make gains. We’re stretching tissue, not growing muscle.
The rumor about ejaculation hindering gains apparently stems from one or more pay PE sites. IMO, the only reason for not blowing a load is to maintain better size immediately post-workout. I don’t think it makes any difference one way or the other for permanent gains.
Concerning ejaculation affecting testosterone level, check out the following abstract:
J Zhejiang Univ Sci 2003 Mar-Apr;4(2):236-40
A research on the relationship between ejaculation and serum testosterone level in men.
Jiang M, Xin J, Zou Q, Shen JW.
Department of Life Science, Hangzhou Normal College, Hangzhou 310020, China. jiangmy@mail.hz.zj.cn
The purpose of this study is to gain understanding of the relationship between ejaculation and serum testosterone level in men. The serum testosterone concentrations of 28 volunteers were investigated daily during abstinence periods after ejaculation for two phases. The authors found that the fluctuations of testosterone levels from the 2nd to 5th day of abstinence were minimal. On the 7th day of abstinence, however, a clear peak of serum testosterone appeared, reaching 145.7% of the baseline ( P < 0.01). No regular fluctuation was observed following continuous abstinence after the peak. Ejaculation is the precondition and beginning of the special periodic serum testosterone level variations, which would not occur without ejaculation. The results showed that ejaculation-caused variations were characterized by a peak on the 7th day of abstinence; and that the effective time of an ejaculation is 7 days minimum. These data are the first to document the phenomenon of the periodic change in serum testosterone level; the correlation between ejaculation and periodic change in the serum testosterone level, and the pattern and characteristics of the periodic change.
PMID: 12659241 [PubMed - in process]
Seven freakin’ days to maximize testosterone!! Screw that. There are other/better ways to bump up T if it is low. If it’s not low there’s no need to raise it.
Hormone levels vary a great deal throughout the day. Notice the percentages in this abstract:
Clin Chem Lab Med 1998 Jun;36(7):485-91
Biological day-to-day variation and daytime changes of testosterone, follitropin, lutropin and oestradiol-17beta in healthy men.
Ahokoski O, Virtanen A, Huupponen R, Scheinin H, Salminen E, Kairisto V, Irjala K.
Department of Oncology and Radiotherapy, University of Turku, Finland. outi.ahokoski@utu.fi
Information on biological day-to-day variation is needed for detecting within-subject changes over time. In this study the daytime changes and the biological day-to-day variation of serum testosterone, follitropin, lutropin and oestradiol-17beta concentrations were investigated in 31 healthy males. To analyse daytime changes, blood specimens were taken at 0800 h, 1200 h, 1600 h and 2000 h during one day (n=31) and two days (n=8). The day-to-day variation was analysed from blood specimens collected at 0800 h on days 1 and 2 (n=31) and additionally on days 3, 4, 6 and 9 (n=8). The evaluation of the day-to-day variation was based on calculations of the within-subject (CVA+I) and between-subject (CV(G)) coefficients of variation. When the within-subject day-to-day variances were not too heterogeneous, they were used for the calculation of 95 % reference change limits. Serum testosterone and oestradiol-17beta concentrations showed a significant daytime variation; testosterone had higher serum concentrations at 0800 and 1200 h. A peak in the serum concentration of oestradiol-17beta occurred at 1200 h with a decrease towards the evening. There were no clear daytime changes in the serum concentrations of follitropin or lutropin. For different analytes the reference change limits were: serum testosterone +/- 32.0 %, serum follitropin +/- 24.1 % and serum oestradiol-17beta +/- 38.3 %. The reference change limit was not calculated for serum lutropin, as a high degree of heterogeneity and individuality was found. The interpretation of the results of hormone measurements requires recognition of the biological daytime and day-to-day changes of hormones. The reference change limits determine what changes are significant when monitoring the patient.
PMID: 9746274 [PubMed - indexed for MEDLINE]