Peristalsis
no
I believe that is called diastole, in contrast to systole, the contraction of the heart muscles.
systole
A severe contraction is referred to as a depression, the type that occurred in 1930s.
isometric
bracing
vasoconstriction
I believe that was only in WWI. And Germany and Austria-Hungary were in Central Europe.
The two forces that struggle in a conflict are typically referred to as opposing forces or conflicting parties.
ASMR aids relaxation because the effects that it triggers are good feelings. The main effect is head tingling, referred to as headgasms. These gentle head tingles cause the brain to become relaxed. When one is relaxed, the heart slows to a peaceful rhythm.
Depending on who you ask, either the players and supporters of Sheffield Utd, or Sheffield Wednesday can be referred to as pigs, usually by the opposing team.
Galvani concluded the contraction was produced in the organism itself and referred to this new type of electricity as 'animal electricity'.