Marques, Diogo Luís;
Neiva, Henrique Pereira;
Marinho, Daniel Almeida;
Pires, Ivan Miguel;
Nunes, Célia;
Marques, Mário Cardoso
Load-power relationship in older adults: The influence of maximal mean and peak power values and their associations with lower and upper-limb functional capacity
You can manage bookmarks using lists, please log in to your user account for this.
Media type:
E-Article
Title:
Load-power relationship in older adults: The influence of maximal mean and peak power values and their associations with lower and upper-limb functional capacity
Contributor:
Marques, Diogo Luís;
Neiva, Henrique Pereira;
Marinho, Daniel Almeida;
Pires, Ivan Miguel;
Nunes, Célia;
Marques, Mário Cardoso
Description:
<jats:p>Identifying the relative loads (%1RM) that maximize power output (P<jats:sub>max-load</jats:sub>) in resistance exercises can help design interventions to optimize muscle power in older adults. Moreover, examining the maximal mean power (MP<jats:sub>max</jats:sub>) and peak power (PP<jats:sub>max</jats:sub>) values (Watts) would allow an understanding of their differences and associations with functionality markers in older adults. Therefore, this research aimed to 1) analyze the load-mean and peak power relationships in the leg press and chest press in older adults, 2) examine the differences between mean P<jats:sub>max-load</jats:sub> (MP<jats:sub>max-load</jats:sub>) and peak P<jats:sub>max-load</jats:sub> (PP<jats:sub>max-load</jats:sub>) within resistance exercises, 3) identify the differences between resistance exercises in MP<jats:sub>max-load</jats:sub> and PP<jats:sub>max-load</jats:sub>, and 4) explore the associations between MP<jats:sub>max</jats:sub> and PP<jats:sub>max</jats:sub> in the leg press and chest press with functional capacity indicators. Thirty-two older adults (79.3 ± 7.3 years) performed the following tests: medicine ball throw (MBT), five-repetition sit-to-stand (STS), 10-m walking (10 W), and a progressive loading test in the leg press and chest press. Quadratic regressions analyzed 1) the load-mean and peak power relationships and identified the MP<jats:sub>max-load</jats:sub>, MP<jats:sub>max</jats:sub>, PP<jats:sub>max-load</jats:sub>, and PP<jats:sub>max</jats:sub> in both exercises, 2) the associations between MP<jats:sub>max</jats:sub> and PP<jats:sub>max</jats:sub> in the chest press with MBT, and 3) the associations between MP<jats:sub>max</jats:sub> and PP<jats:sub>max</jats:sub> in the leg press with STS<jats:sub>power</jats:sub> and 10W<jats:sub>velocity</jats:sub>. In the leg press, the MP<jats:sub>max-load</jats:sub> was ∼66% 1RM, and the PP<jats:sub>max-load</jats:sub> was ∼62% 1RM, both for women and men (<jats:italic>p</jats:italic> &gt; 0.05). In the chest press, the MP<jats:sub>max-load</jats:sub> was ∼62% 1RM, and the PP<jats:sub>max-load</jats:sub> was ∼56% 1RM, both for women and men (<jats:italic>p</jats:italic> &gt; 0.05). There were differences between MP<jats:sub>max-load</jats:sub> and PP<jats:sub>max-load</jats:sub> within exercises (<jats:italic>p</jats:italic> &lt; 0.01) and differences between exercises in MP<jats:sub>max-load</jats:sub> and PP<jats:sub>max-load</jats:sub> (<jats:italic>p</jats:italic> &lt; 0.01). The MP<jats:sub>max</jats:sub> and PP<jats:sub>max</jats:sub> in the chest press explained ∼48% and ∼52% of the MBT-1 kg and MBT-3 kg variance, respectively. In the leg press, the MP<jats:sub>max</jats:sub> and PP<jats:sub>max</jats:sub> explained ∼59% of STS<jats:sub>power</jats:sub> variance; however, both variables could not explain the 10W<jats:sub>velocity</jats:sub> performance (<jats:italic>r</jats:italic><jats:sup><jats:italic>2</jats:italic></jats:sup> ∼ 0.02). This study shows that the P<jats:sub>max-load</jats:sub> is similar between sexes, is resistance exercise-specific, and varies within exercises depending on the mechanical power variable used in older adults. Furthermore, this research demonstrates the influence of the MBT as an upper-limb power marker in older adults.</jats:p>