Compression　sports　bras　are　designed　to　protect　the　breasts　by　compressing　them　against　the　chest　wall　during　physical　activities.　However,　scientific　analyses　of　the　mechanical　interactions　between　the　body　and　sports　bras　have　been　largely　absent.　Therefore,　the　aim　of　this　study　is　to　simulate　the　static　and　dynamic　contact　conditions　and　dynamic　displacements　by　using　a　finite　element　(FE)　analysis.　The　FE　model　of　the　body　is　constructed　with　a　rigid　torso,　hyperelastic　breasts,　and　subcutaneous　tissues.　Scanning　is　carried　out　to　obtain　a　geometric　model　of　the　body.　The　material　coefficients　of　the　breasts　are　determined　by　examining　the　differences　between　the　FE-modelled　results　and　experimental　data.　The　FE　contact　model　of　a　female　body　and　sports　bra　is　used　to　calculate　the　static　and　dynamic　contact　pressure,　dynamic　displacement　of　the　breasts,　and　natural　frequencies　of　the　breasts　with　and　without　donning　a　sports　bra.　The　calculated　root　mean　square　errors　are　less　than　1%,　which　shows　a　good　agreement　between　the　FE　results　and　experimental　data.　The　FE　contact　model　in　this　study　provides　a　better　understanding　of　the　interaction　between　sports　bras　and　the　body　and　theoretical　support　for　compression　sports　bra　designs.　(C)　2019　The　Authors.　Published　by　Elsevier　Ltd.