Hormonal responses to marathon running in non-elite athletes

Karkoulias, Kiriakos; Habeos, Ioannis; Charokopos, Nikolaos; Tsiamita, Maria; Mazarakis, Andreas; Pouli, Anastasia; Spiropoulos, Kostas

doi:10.1016/j.ejim.2007.06.032

Cited by 42 publications

(32 citation statements)

References 15 publications

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“…53 The T:C ratio decreased immediately postrace, which is in agreement with findings from an Ironman triathlon, 45 suggesting that the body is in a catabolic state on completion of demanding endurance events. The state of catabolism was still evident at D1, in contrast to an Ironman triathlon, 46 with the T:C ratio returning to baseline levels by D2.…”

Section: Discussionsupporting

confidence: 73%

The Impact of an Ultramarathon on Hormonal and Biochemical Parameters in Men

Kupchak

Kraemer

Hoffman

et al. 2014

Wilderness & Environmental Medicine

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Section: Discussionsupporting

confidence: 73%

The Impact of an Ultramarathon on Hormonal and Biochemical Parameters in Men

Kupchak

Kraemer

Hoffman

et al. 2014

Wilderness & Environmental Medicine

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“…Conversely, sports participation might influence T. Endurance activities have been shown to reduce T production in short-term exercise bouts (Hoogeveen and Zonderland,TABLE 5. Multiple regression models predicting grip strength (kg) 1996; Karkoulias et al, 2008) and over months of training (Urhausen et al, 1987;Wheeler et al, 1991;Tyndall et al, 1996). Although we lack data on basketball or weightlifting intensity, our finding that active men tend to have higher T does not support the notion that rigorous activity suppressed T in our sample.…”

Section: Discussioncontrasting

confidence: 55%

Testosterone, physical activity, and somatic outcomes among Filipino males

Gettler

Agustin

Kuzawa

2010

American J Phys Anthropol

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Testosterone (T) facilitates male investment in reproduction in part through its anabolic effects on skeletal muscle. Traits like muscle and strength are energetically costly but are believed to enhance competitive ability in humans and other mammals. However, there are limited data on relationships between T and somatic outcomes in lean, non-western populations. We evaluate relationships between waking and pre-bed salivary T and adiposity, fat-free mass (FFM), arm muscle area (AMA), and grip strength (GS) in a large, population-based birth cohort of young adult Filipino males (20.8-22.6 years, n = 872). Data were collected as part of the Cebu Longitudinal Health and Nutrition Survey. Neither waking nor evening T predicted FFM, AMA, or GS. However, there were borderline or significant interactions between T and basketball playing (the most common team sport) and weight lifting as predictors of outcomes: higher waking T predicted higher FFM (activity x T interaction P < 0.01), AMA (interaction P < 0.1), and GS (interaction P < 0.02) among frequent basketball players, and GS (interaction P < 0.09) among the smaller sample of weight lifters. In contrast to clinical studies, but consistent with findings in several subsistence-level populations, T was positively related to adiposity in these lean young males, suggesting that energy status might regulate circulating T. Our findings support a role of the prewaking rise in T as a determinant of energetic allocation to lean mass and strength in the context of repeated muscular use and support the hypothesized role of T as a mediator of investment in costly somatic traits in human males.

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“…Aerobic exercise has also been shown to increase cortisol and GH levels (Bloom et al 1976;Bunt et al 1986;Kanaley et al 1997;Karkoulias et al 2008), but has shown varied testosterone responses (Galbo et al 1977;Nagel et al 1992;Schmid et al 1982). Our testosterone response is very comparable to responses to a 90-min high-intensity resistance training protocol (Jensen et al 1991), but smaller compared with 37-41% increases after running 30 min (Webb et al 1984) and 90 min at 70% VO 2max (Jensen et al 1991).…”

Section: Discussionsupporting

confidence: 54%

Hormone responses to a continuous bout of rock climbing in men

Sherk

Kim

et al. 2010

Eur J Appl Physiol

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Rock climbing is rapidly increasing in popularity as a recreational activity and as a competitive sport. Few studies have tested acute physiological responses to climbing, and no studies to date have tested hormone responses to a climbing-based workout. This study aimed to measure testosterone (T), growth hormone (GH), and cortisol (C) responses to continuous vertical climbing in young male rock climbers. Ten male rock climbers, aged between 21 and 30 years, climbed laps on a submaximal 55' climbing route for 30 min, or until exhaustion, whichever came first. Heart rate (HR) was recorded after every lap. Blood samples were collected by venipuncture before (Pre), immediately post (IP), and 15 min after the climbing exercise (P15) to assess blood lactate and plasma GH, T, and C. Subjects climbed 24.9 ± 1.9 min and 507.5 ± 82.5 feet. Peak HR was 182.1 ± 2.3 bpm, and lactate (Pre: 2.9 ± 0.6 mmol/dL, IP: 11.1 ± 1.0 mmol/dL) significantly (P < 0.05) increased from Pre to IP. T concentrations significantly (P < 0.05) increased from Pre (6.04 ± 0.31 ng/mL) to IP (7.39 ± 0.40 ng/mL) and returned to baseline at P15 (6.23 ± 0.33 ng/mL). Cortisol levels did not significantly change during the protocol. GH significantly (P < 0.01) increased from Pre (0.63 ± 0.17 ng/mL) to IP (19.89 ± 4.53 ng/mL) and remained elevated at P15 (15.03 ± 3.89 ng/mL). An acute, short-term bout of high-intensity continuous climbing was an effective exercise stimulus for elevating plasma testosterone and growth hormone levels in young males.

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Hormonal responses to marathon running in non-elite athletes

Cited by 42 publications

References 15 publications

The Impact of an Ultramarathon on Hormonal and Biochemical Parameters in Men

The Impact of an Ultramarathon on Hormonal and Biochemical Parameters in Men

Testosterone, physical activity, and somatic outcomes among Filipino males

Hormone responses to a continuous bout of rock climbing in men

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