Fig. 5.

FVC amplitude (A) and τFVC (B) during dynamic forearm exercise at three separate absolute workloads (∼3.4, 6.9, and 10.4 kg) in a subset of young and older adults (n = 7 for each) under control (saline) and NOS inhibition (l-NMMA) conditions. The amplitude of the vasodilator response did not differ between age groups at any level of exercise. The vasodilator responses were slower (prolonged τFVC) in older adults at all exercise intensities. Additionally, NOS inhibition slowed τFVC in the young adults. *P < 0.05 vs. young, †P < 0.05 vs. control.