Schaefer Laura V, Dech Silas, Wolff Lara L, Bittmann Frank N
Neuromechanics Laboratory, Regulative Physiology and Prevention, Department Sport and Health Sciences, University of Potsdam, 14476 Potsdam, Germany.
Regulative Physiology and Prevention, Department Sports and Health Sciences, University of Potsdam, 14476 Potsdam, Germany.
Brain Sci. 2022 Sep 29;12(10):1318. doi: 10.3390/brainsci12101318.
The link between emotions and motor function has been known for decades but is still not clarified. The Adaptive Force (AF) describes the neuromuscular capability to adapt to increasing forces and was suggested to be especially vulnerable to interfering inputs. This study investigated the influence of pleasant and unpleasant food imagery on the manually assessed AF of elbow and hip flexors objectified by a handheld device in 12 healthy women. The maximal isometric AF was significantly reduced during unpleasant vs. pleasant imagery and baseline (p < 0.001, dz = 0.98−1.61). During unpleasant imagery, muscle lengthening started at 59.00 ± 22.50% of maximal AF, in contrast to baseline and pleasant imagery, during which the isometric position could be maintained mostly during the entire force increase up to ~97.90 ± 5.00% of maximal AF. Healthy participants showed an immediately impaired holding function triggered by unpleasant imagery, presumably related to negative emotions. Hence, AF seems to be suitable to test instantaneously the effect of emotions on motor function. Since musculoskeletal complaints can result from muscular instability, the findings provide insights into the understanding of the causal chain of linked musculoskeletal pain and mental stress. A case example (current stress vs. positive imagery) suggests that the approach presented in this study might have future implications for psychomotor diagnostics and therapeutics.
情绪与运动功能之间的联系已为人所知数十年，但仍未得到阐明。适应性力量（AF）描述了神经肌肉适应不断增加的力量的能力，并且被认为特别容易受到干扰性输入的影响。本研究调查了在12名健康女性中，通过手持设备客观评估的愉快和不愉快食物意象对肘部和髋部屈肌的AF的影响。与愉快意象和基线相比，不愉快意象期间最大等长AF显著降低（p < 0.001，dz = 0.98 - 1.61）。在不愉快意象期间，肌肉拉长开始于最大AF的59.00 ± 22.50%，这与基线和愉快意象形成对比，在基线和愉快意象期间，等长姿势在整个力量增加过程中大多可以维持，直至达到最大AF的约97.90 ± 5.00%。健康参与者表现出由不愉快意象引发的立即受损的握持功能，可能与负面情绪有关。因此，AF似乎适合即时测试情绪对运动功能的影响。由于肌肉骨骼问题可能由肌肉不稳定引起，这些发现为理解相关肌肉骨骼疼痛和精神压力的因果链提供了见解。一个案例示例（当前压力与积极意象）表明，本研究中提出的方法可能对心理运动诊断和治疗具有未来意义。
