diff --git a/build/bin/mainV9.exe b/build/bin/mainV9.exe
index 90eabb3..dc1fb2c 100644
Binary files a/build/bin/mainV9.exe and b/build/bin/mainV9.exe differ
diff --git a/src/collections/methods/lower_body.cpp b/src/collections/methods/lower_body.cpp
index 5703af0..05d976a 100644
--- a/src/collections/methods/lower_body.cpp
+++ b/src/collections/methods/lower_body.cpp
@@ -81,7 +81,7 @@ void Lower_Body::update(sf::Clock cl, float multiplier){
     float dxAcc = dx->getZ_Acc() ;
 
     int64_t Dtime = cl.getElapsedTime().asMicroseconds();
-    if (prevT == 0) prevT = Dtime;
+    if (prevT == 0) prevT >= Dtime;
     float dt = (float(Dtime) / 1000000.0) - (float(prevT) / 1000000.0);
     prevT = Dtime;
 
diff --git a/src/rigidbody/methods/rb_class.cpp b/src/rigidbody/methods/rb_class.cpp
index c0ed1bc..843cca4 100755
--- a/src/rigidbody/methods/rb_class.cpp
+++ b/src/rigidbody/methods/rb_class.cpp
@@ -87,7 +87,7 @@ void rigidbody::calcPos(const float Dtime){
 
 void rigidbody::step(const sf::Clock time, float multiplier){
     int64_t Dtime = time.getElapsedTime().asMicroseconds();
-    if (prevT == 0) prevT = Dtime;
+    if (prevT == 0) prevT >= Dtime;
 
 
     float dt = ((float(Dtime) / 1000000.0) - (float(prevT) / 1000000.0)) * multiplier;
diff --git a/src/testMain.cpp b/src/testMain.cpp
index aae6534..4d53cd8 100755
--- a/src/testMain.cpp
+++ b/src/testMain.cpp
@@ -106,7 +106,7 @@ int main() {
     sf::Clock mainClock;
     while (gs.window.isOpen()) 
     {
-        curTime += mainClock.restart().asMilliseconds();
+        curTime += mainClock.restart().asMilliseconds() *(*gs.tMul) ;
         if (curTime > T){
             if (gs.play && pos+curTime/T < maj) pos += curTime / T; 
             curTime = 0;