  Practical determination of physical recovery after intense exercise is a
challenging topic that must include mechanical aspects as well as cognitive
ones because most of physical sport activities, as well as professional
activities (including brain computer interface-operated systems), require good
shape in both of them. This paper presents a new online handwritten database of
20 healthy subjects. The main goal was to study the influence of several
physical exercise stimuli in different handwritten tasks and to evaluate the
recovery after strenuous exercise. To this aim, they performed different
handwritten tasks before and after physical exercise as well as other
measurements such as metabolic and mechanical fatigue assessment. Experimental
results showed that although a fast mechanical recovery happens and can be
measured by lactate concentrations and mechanical fatigue, this is not the case
when cognitive effort is required. Handwriting analysis revealed that
statistical differences exist on handwriting performance even after lactate
concentration and mechanical assessment recovery. Conclusions: This points out
a necessity of more recovering time in sport and professional activities than
those measured in classic ways.
