Proceedings of The Physiological Society

Europhysiology 2018 (London, UK) (2018) Proc Physiol Soc 41, PCB186

Poster Communications

Maximum Inspiratory Pressure association with Countermovement Jump with regard to age and gender

A. Roldán1, E. García-Domínguez1, C. Blasco-Lafarga1, A. Cordellat Marzal1, P. Monteagudo1, N. Blasco-Lafarga2, M. Gómez-Cabrera3

1. Physical Education and Sports Department, University of Valencia, Valencia, Spain. 2. Primary Health Centre in Peset-Hospital area, Valencia, Spain. 3. Physiology Department, University of Valencia, Valencia, Spain.

  • Figure 1. Scatter plot and linear regression for MIP and CMJ Height (left: whole sample; right: considering gender)

  • Figure 2. Scatter plot and linear regression for MIP and CMJ relative power (left: whole sample; right: considering gender).

Once verified large similarities in the influence of gender on jumping ability and inspiratory capacity in a group of active elderly (1), this section of the study aims to analyse the association between their Maximum Inspiratory Pressure (MIP), and their Height (H) and Relative Power (RP) (2) in a Countermovement Jump (CMJ). Whether these strength capacities evolve together or not with age, it is important for their preservation and improvement, and remains unknown. With this aim, 24 non-smokers healthy elderly (15 women: 71.44±4.31 years; 61.87±7.53 Kg; 1.54±0.05 cm and 9 men: 69.81±4.18 years; 80.67±9.12 Kg; 1.66±0.05 cm), undergoing a multicomponent exercise training program (MCTP), were assessed of body composition, blood pressure, MIP (3) and CMJ(4). The measurements were carried out for two days separated by one week. After testing for normality, Pearson correlation analysis were conducted, with and without the covariates age, gender, and age+gender. Scatter plot and linear regression where added considering the whole sample and selecting men and women separately. Cero Pearson's Coefficient showed a high correlation between both strength capacities, whatever the jumping variable (MIP-CMJH: r=0.711, p=0.000; MIP-CMJRP: r=0.716; p=0.000); an association which was slightly reduced when considering the covariate age (MIP-CMJH: r=0.647, p=0.001; MIP-CMJRP: r=0.616, p=0.002). However, the covariate gender reduced the correlation (MIP-CMJH: r=0.425, p=0.043) or even lost it when adjusting the performance to body composition (MIP-CMJRP: r=0.353, p=0.098). This gender influence was confirmed when controlling for both, age and gender together, since the correlation totally disappeared in both associations (MIP-CMJH: r=0.356, p=0.103; MIP-CMJRP: r=0.180, p=0.422). Important changes and the reduction in the linear regression (R2) also evidenced this large gender influence (Figures 1&2). According to our results, mainly gender explains that higher CMJ height or relative power does not involve higher inspiratory muscle strength in active and functionally trained elderly, although age must be also considered. In fact, MIP formulae already considered these two influences on inspiratory capacity (5). Lower limbs and inspiratory muscle strength seem to respond in a different manner to exercise training, since the MCTP was more neuromuscular than respiratory or metabolic. In conclusion, the improvement of lower limb functional capacities does not ensure the enhancement or even preservation of the inspiratory musculature, suggesting the inclusion of specific respiratory training exercises in MCTP, especially for older women.

Where applicable, experiments conform with Society ethical requirements