Control checked checkbox

Hi guys, i don’t know how hundle checkbox input in a form i have this code:


***** .ts*********
this.activites = this.getAllActivities();
this.profileForm ={
nom: [‘med’, ],
prenom: [‘med’, ],
taille: 165.5,
poids: 57,
mes_activites: [],
club_plus_freq: [],

i get a list of activities from a backend and i put it in list of checkbox, i need to check the group of checked box, any solution to do that ?!