diff --git a/cmd/fitactivity/README.md b/cmd/fitactivity/README.md
index 7c7630da..963611b8 100644
--- a/cmd/fitactivity/README.md
+++ b/cmd/fitactivity/README.md
@@ -2,7 +2,7 @@
 
 A program to handle FIT files based on provided command:
 
-1. **combine**: combine multiple activities into one continous activity.
+1. **combine**: combine multiple activities into one continuous activity.
 1. **conceal**: conceal first or last x meters GPS positions for privacy.
 1. **reduce**: reduce the size of record messages, available methods:
    - Based on GPS points using RDP [Ramer-Douglas-Peucker]
@@ -157,7 +157,7 @@ Usage:
   fitactivity [command]
 
 Available Commands:
-  combine    combine multiple activities into one continous activity
+  combine    combine multiple activities into one continuous activity
   conceal    conceal first or last x meters GPS positions for privacy
   reduce     reduce the size of record messages, available methods:
              1. Based on GPS points using RDP [Ramer-Douglas-Peucker]
@@ -182,7 +182,7 @@ Output:
 
 ```sh
 About:
-  combine multiple activities into one continous activity
+  combine multiple activities into one continuous activity
 
 Usage:
   fitactivity combine [subcommands] [flags] [files]
diff --git a/cmd/fitactivity/combiner/combiner.go b/cmd/fitactivity/combiner/combiner.go
index a8806bd2..e088a0a7 100644
--- a/cmd/fitactivity/combiner/combiner.go
+++ b/cmd/fitactivity/combiner/combiner.go
@@ -29,7 +29,7 @@ const (
 	errSportMismatch  = errorString("sport mismatch")
 )
 
-// Combine combines multiple FIT activities into one continous activity.
+// Combine combines multiple FIT activities into one continuous activity.
 func Combine(fits []*proto.FIT) (result *proto.FIT, err error) {
 	for i := 0; i < len(fits); i++ {
 		if len(fits[i].Messages) == 0 {
diff --git a/cmd/fitactivity/main.go b/cmd/fitactivity/main.go
index ecbc94ae..e4b6feca 100644
--- a/cmd/fitactivity/main.go
+++ b/cmd/fitactivity/main.go
@@ -43,7 +43,7 @@ var (
 )
 
 const (
-	combineDesc = "combine multiple activities into one continous activity"
+	combineDesc = "combine multiple activities into one continuous activity"
 	concealDesc = "conceal first or last x meters GPS positions for privacy"
 	reduceDesc  = `reduce the size of record messages, available methods:
              1. Based on GPS points using RDP [Ramer-Douglas-Peucker]
diff --git a/cmd/fitactivity/reducer/reducer.go b/cmd/fitactivity/reducer/reducer.go
index e1987933..ac7e9abd 100644
--- a/cmd/fitactivity/reducer/reducer.go
+++ b/cmd/fitactivity/reducer/reducer.go
@@ -149,7 +149,7 @@ func reduceByRDP(fit *proto.FIT, epsilon float64) error {
 	return nil
 }
 
-// findFragments finds ommited records based on RDP result and returning the index as fragments.
+// findFragments finds omitted records based on RDP result and returning the index as fragments.
 func findFragments(recordIndexes []int, points []rdp.Point) (fragments []int) {
 	var i, j int
 	// Reslicing is safe as index will always move forward
@@ -202,7 +202,7 @@ func reduceByDistanceInterval(fit *proto.FIT, threshold uint32) error {
 				if d != basetype.Uint32Invalid {
 					last = d
 				}
-				valid++ // Perserve first record
+				valid++ // Preserve first record
 				continue
 			}
 			if d == basetype.Uint32Invalid {
@@ -237,7 +237,7 @@ func reduceByTimeInterval(fit *proto.FIT, threshold uint32) error {
 				if t != basetype.Uint32Invalid {
 					last = t
 				}
-				valid++ // Perserve first record
+				valid++ // Preserve first record
 				continue
 			}
 			if t == basetype.Uint32Invalid {