How to specify the quickest movement a human can do based on MTM standards? I am looking for a benchmark as a reference regarding the human Kinesiology that specifies the quickest movement a human can do on basic everyday movements like computer mouse clicking. As far as I know, there is an standard called MTM (Measurement Time Methods) in the field of industrial engineering and ergonomics which specifies the required time for each basic movement to be done by human. This MTM standard time is provided on the basis of not putting the human (worker) in an overload or underload working situation. So I assume MTM cannot provide me with the shortest possible duration (time) a basic movement can be performed. 
I am not sure whether we have such a benchmark based on human physiology, Do you have any suggestion in this regard? I recorded response times and have a distribution of these response times for many subjects, however, I would like to estimate the minimum possible response time a human can do in my experiment
I don't know about any MTM standards or benchmarks, but motor response latencies have been assessed in many studies. Importantly, auditory response latencies are smallest, then tactile followed by visual response times. This, because the auditory system is swift, while the visual system is sluggish by comparison (source: Packman &amp; Packman).

For example, Jain et al. (2015) report a mean visual response latency of 247 ms and an auditory response latency of 228 ms. Another study reports approximately 144 and 133 ms, respectively. The lower values are probably because the authors chose the lowest reading as their final measurement Gavkare et al, 2013). Other technical differences may also have yielded deviations. Importantly, stimulus intensity affects reaction time (e.g., louder auditory stimuli decrease reaction time) and other stimulus parameters do so as well (source: Packman &amp; Packman). Importantly, age is positively correlated with reaction time (Ng &amp; Chan, 2012).     

A large data set where the authors stratified their subject pool in age groups as well as other parameters can be found in Ng &amp; Chan, 2012. 

References
- Gavkare et al,, Indian Medical Gazette, June 2013
- Jain et al., Int J Appl Basic Med Res (2015); 5(2)
- Ng &amp; Chan, IMECS (2012)