Research Frontiers Can male grip strength reflect sperm quality?

The general demographic characteristics of participants stratified by quartile of grip strength are shown in Table 1
.
The median and interquartile range (IQR) of semen volume, sperm density, forward motility, total sperm motility and total count were 2.
9 (1.
5) ml, 48.
3×10 6 (31.
9×¹⁰ 6)/ml, 57.
5% (13.
2%), 60.
8% (13.
2%), and 138.
6×10⁶ (109.
3×10 ^{6), respectively} ）
。 Compared with men in the lower quartile of grip strength, men in the upper quartile had a higher BMI (23.
7±3.
2 kg/m2 vs^22.
3± 3.
3 kg/m²), shorter abstinence periods (6.
0±3.
3 d vs 6.
4±3.
6 days), and higher marriage rates (37.
6% vs 23.
1%)
.

Table 1 General demographic characteristics and sperm quality of participants stratified by quartile of grip strength

After adjusting for confounding factors, both the mixed-effects model (Table 2) and the restriction cubic spline model (Figure 1) showed that grip strength was positively correlated with semen volume, sperm density, forward motility sperm rate, total sperm motility, and total count (P<0.
05).
<b10> 。 Compared with men in the lower quartile of grip strength, men in the upper quartile had 14.
2% (95% CI: 5.
9% to 23.
2%), 19.
5% (95% CI: 7.
3% to 33.
1%), 9.
5% (95% CI: 3.
4% to 15.
9%), 8.
8% (95% CI: 3.
2% to 14.
6%) and 36.
4% (95% CI: 18.
9%- 56.
5%）
。

Table 2 is based on a mixed-effects model, grip strength (kg) versus sperm quality

Fig.
1 Relationship between grip strength (kg) and sperm quality