Therefore, inflammation prevents maximal uptake of oxygen by cells.
We measured the kinetic of platelet 5-HT uptake (maximal velocity, Vmax and the Michaelis Menten constant, Km) in patients with overuse of triptans (tMOH, n = 15) or analgesics (aMOH, n = 14) before and after drug withdrawal, as well as in headache-free healthy subjects (n = 15) and patients with episodic migraine (EM, n = 16).
Previous investigations have reported that running at either an intensity equal to maximal oxygen uptake or at maximal running velocity (Vmax) may lead to superior chronic adaptations when compared to continuous running in high-level athletes [ 3] or elicit rapid improvement in "aerobic fitness" in recreational athletes [ 4].
The maximal velocity of glutamate uptake was decreased as a result of hypergravity loading, but no difference in the Km values between control rats and hypergravity exposed animals was observed.
The experiments performed with Rb+ showing an increased Km without a change of Vmax indicate that in fact, and possibly due to the decreased effective concentration of the cation at the cell surface, higher concentrations were required to achieve half the maximal velocity of the uptake.
The experiments performed with Rb+ showing an increased Km without a change of V max indicate that in fact, and possibly due to the decreased effective concentration of the cation at the cell surface, higher concentrations were required to achieve half the maximal velocity of the uptake.
Five physiological tests measure physical function defined as: estimated maximum muscle strength (knee extension, knee flexion, arm flexion, arm extension and leg press), maximal oxygen uptake (VO2peak), balance, gait velocity and steps frequency and activity levels (see table 1).
The maximal velocity of l-[14C]glutamate uptake decreased from 12.5 ± 3.2 to 5.6 ± 0.9 nmol/min/mg of protein under artificial gravity conditions.
The affinity and maximal velocity of 2-DG uptake were deduced from Michaelis Menten plots obtained with 2-DG concentrations ranging from 0 to 5 mM.
Doppler echocardiography revealed tricuspid regurgitation (maximal velocity: 243 cm/s; maximal pressure gradient, 23,6 mmHg).
