About: http://webisa.webdatacommons.org/188002608

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Your example of squats is good and yes I think that one could simply lower the weight or do fewer reps that day.
http://www.w3.org/ns/prov#wasQuotedFrom	exrx.net