Body symmetry and physical strength in human males

Fink, Bernhard; Weege, Bettina; Manning, John T.; Trivers, Robert

doi:10.1002/ajhb.22584

Cited by 29 publications

(23 citation statements)

References 45 publications

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“…Gray and Marlowe [5] added the FA of all individual traits (ear length, ear breadth, elbow breadth, writs breadth, finger lengths, ankle breadth and foot breadth) to yield a person´s combined fluctuating asymmetry. Similar composite or combined asymmetry indices were calculated by Özener [16], Fink et al [28], Flegr et al [25] and Milne et al [23]. In the present study, we used the composite asymmetry score according to Fink et al [28] summarizing (unsigned) left minus right side differences of trait measurements corrected for traits size IL − RI/(R + L) × 0.5.…”

Section: Asymmetrymentioning

confidence: 88%

“…Similar composite or combined asymmetry indices were calculated by Özener [16], Fink et al [28], Flegr et al [25] and Milne et al [23]. In the present study, we used the composite asymmetry score according to Fink et al [28] summarizing (unsigned) left minus right side differences of trait measurements corrected for traits size IL − RI/(R + L) × 0.5. Based on this formula composite directional asymmetry and composite fluctuating asymmetry were calculated.…”

Section: Asymmetrymentioning

confidence: 88%

“…Although there may be some doubt that composite measures reflect meaningful signals of developmental instability, composite indices have been used in the present study. This was mainly because composite indices have been used in several studies analyzing FA patterns [5,16,25,28].…”

Section: Discussionmentioning

confidence: 99%

“…In a second step unsigned right minus left side differences of trait measurements were calculated (R-L). Absolute asymmetry (AA) of each trait was calculated as follows: Unsigned asymmetry was corrected for trait size according to the formula: AA = (Iright -leftI)/[(right + left)/2] according to Palmer and Strobeck [14] and Fink et al [28]. This method allows the direct comparison of asymmetries in dimensions of different size.…”

Section: Asymmetrymentioning

confidence: 99%

See 3 more Smart Citations

Androgen Levels and Body Size Are Associated with Directional as Well as Fluctuating Asymmetry Patterns in Adult !Kung San and Kavango Males from Northern Namibia

Kirchengast

Christiansen

2017

Symmetry

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Abstract:Fluctuating asymmetry is mainly interpreted as an indicator of developmental instability, while directional asymmetry of the upper limbs is associated with handedness. The association patterns between adult androgen levels and fluctuating as well directional asymmetry patterns are still unclear. In the present study, the association between adult androgen levels, body size and directional as well as fluctuating asymmetry pattern was tested among !Kung San and Kavango males from northern Namibia. Serum concentrations of testosterone (Tser) and 5α-dihydrotestosterone (DHT) as well as salivary testosterone (Tsal) concentrations were obtained from 114 !Kung San and 136 Kavango men aged 18-40 years. Fluctuating and directional asymmetry were determined from eight paired traits. Signed and unsigned asymmetry, composite fluctuating and directional asymmetry were calculated. !Kung San males surpassed their Kavango counterparts in the directional asymmetry but also in composite directional asymmetry (CDA) significantly. Among !Kung San males, DHT correlated significantly negatively with parameters of fluctuating asymmetry as well as with parameters of directional asymmetry. Free testosterone of the saliva correlated significantly negatively with asymmetry of hand length. Among Kavango males, DHT is negatively associated with foot breadth asymmetry, but positively associated with wrist asymmetry. Although the correlations between asymmetry patterns and androgen levels are weak, it can be concluded that among !Kung San males adult androgen levels are negatively associated with a high quality phenotype.

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Section: Asymmetrymentioning

confidence: 88%

Section: Asymmetrymentioning

confidence: 88%

Section: Discussionmentioning

confidence: 99%

Section: Asymmetrymentioning

confidence: 99%

See 2 more Smart Citations

Androgen Levels and Body Size Are Associated with Directional as Well as Fluctuating Asymmetry Patterns in Adult !Kung San and Kavango Males from Northern Namibia

Kirchengast

Christiansen

2017

Symmetry

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“…As if this list of previous interests was not enough, Trivers is now conducting long-term research into anatomical symmetry in humans as a predictor of athletic speed. 8 He also has an interest in the evolutionary understanding of "honour killings" and homosexuality 9 -and has founded an armed group to protect gay men from mob violence in Jamaica.…”

Section: Competing Genesmentioning

confidence: 99%

A life on the wild side

Launer¹

2016

Postgraduate Medical Journal

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Physical Attractiveness: An Adaptationist Perspective

Sugiyama

2015

The Handbook of Evolutionary Psychology

100

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How and why do our minds generate different levels of attraction to others? This chapter integrates life history, evolutionary psychology, and human biology approaches to address this question. Biological adaptations regulate a vast number of life history trade‐offs that affect how we look, smell, sound, and behave. Selection produced adaptations that evaluate these cues and regulate our degree of attraction to others based on their relative probable social value to us in different contexts. This chapter outlinesthe alternative evolutionary explanations for the emergence of an attraction,basic components necessary for attraction systems to evolve, and sources of variation in attractiveness assessment. It identifies different domains of social value for which attractiveness assessment evolved, reviews evidence for some of the hypothesized attractiveness‐assessment adaptations in those domains, and highlights avenues calling for increased attention. Finally, it calls for greater integration of evolutionary psychology, human biological research, and data from small‐scale foraging societies to generate predictions about these domains of social value, the cues or signals associated with them, adaptations selected to regulate attraction to them, and the life history trade‐offs involved in these processes. New research on body shape attractiveness is presented to illustrate these points.

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Body symmetry and physical strength in human males

Abstract: We conclude that in males, body symmetry and physical strength are correlated such that symmetric individuals tend to develop higher strength, which may contribute to their success in inter- and intra-sexual selection.

Cited by 29 publications

References 45 publications

Androgen Levels and Body Size Are Associated with Directional as Well as Fluctuating Asymmetry Patterns in Adult !Kung San and Kavango Males from Northern Namibia

Androgen Levels and Body Size Are Associated with Directional as Well as Fluctuating Asymmetry Patterns in Adult !Kung San and Kavango Males from Northern Namibia

A life on the wild side

Physical Attractiveness: An Adaptationist Perspective

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